Last Updated on 16 September, 2026 by Elby | The Tasteful Pantry
Raspberry white chocolate slice is what happens when you take creamy white chocolate, throw in plenty of tart raspberries and bake the whole lot into a buttery slice with a soft, tender centre. Every bite has a little sharpness from the berries, pockets of melted chocolate and lightly golden edges that I would happily claim as the baker’s fee.
It sits somewhere between a blondie and a cake. It isn’t as dense or fudgy as a traditional blondie, but it has much more buttery richness than an everyday cake. More importantly, it can be mixed in one bowl without hauling out the electric mixer.
The batter is thick. Very thick. The first time you make it, you may stare into the bowl and wonder if something has gone wrong. It hasn’t. Gently work in the chocolate and raspberries, spread the mixture into the pan and trust the process.
This slice works beautifully for afternoon tea, lunchboxes, picnics and shared dessert tables. Serve it as it is, add a light drizzle of white chocolate, or warm it slightly and bring in a scoop of vanilla ice cream if dessert needs to be taken seriously. If sweet and tart baking combinations are your weakness, try my raspberry and white chocolate muffins, raspberry white chocolate brownies or raspberry cheesecake next. My caramel slice is another very good place to look when the day calls for a proper bakery treat.
What Makes This Easy Raspberry Slice Recipe So Good?
White chocolate and raspberries keep each other in check. White chocolate is sweet, creamy and rich, while raspberries bring acidity and a bright berry flavour. Without the berries, the slice could easily become overly sweet. Without the chocolate, it wouldn’t have those soft, creamy pockets scattered through the crumb.
The melted butter gives the slice richness without needing to cream butter and sugar. It also helps create a tender texture and means the batter comes together quickly with a whisk and spoon.
Frozen raspberries make this especially convenient. You can keep a bag in the freezer and bake the slice whenever the mood strikes, without waiting for raspberry season.
You also don’t need icing. A little melted white chocolate looks pretty if the slice is for a celebration, but the flavour and texture are already doing plenty of work.
Ingredients For The Raspberry White Chocolate Slice Recipe
Unsalted butter: Melted butter provides richness and makes this a straightforward stir-and-bake slice. Let it cool slightly before combining it with the other ingredients so it doesn’t begin cooking the eggs.
Granulated sugar: Regular white sugar adds sweetness without changing the colour or competing with the raspberry flavour.
Vanilla extract: Vanilla rounds out the buttery mixture and works particularly well with white chocolate. Use extract rather than essence if possible for a fuller flavour.
Salt: A small amount sharpens the other flavours and stops the sweetness from feeling flat. It matters here because both the sugar and white chocolate bring plenty of sweetness.
Eggs: Eggs hold the slice together and give it its soft crumb. Room-temperature eggs incorporate more easily, particularly when they’re being mixed into melted butter.
Plain flour: Plain or all-purpose flour creates the structure. Measure it carefully and avoid packing it firmly into a cup, as too much flour can make the baked slice dry.
Baking powder: This provides just enough lift to keep the slice tender rather than heavy. It won’t rise dramatically, and it isn’t meant to.
Raspberries: Fresh and frozen raspberries can both be used. I generally use frozen berries because they’re firmer when folded through the batter and are less likely to collapse immediately. Add them straight from the freezer; thawed raspberries release more juice and can turn the batter pink and streaky.
White chocolate chips: Chips hold their shape well and leave distinct pockets of chocolate throughout the slice. Chopped white cooking chocolate also works, giving you a mixture of small melted streaks and larger chocolate pieces.
How To Make Raspberry White Chocolate Slice
Step one: Prepare the pan. Grease the slice pan and line it with baking paper, leaving enough paper extending over the sides to lift the slice out. Preheat the oven before beginning so the thick batter can go into a properly heated oven as soon as it is mixed.
Step two: Combine the wet ingredients. Mix the melted butter with the sugar, vanilla and salt. Whisk in the eggs until the mixture looks smooth and well combined. The sugar won’t dissolve completely, which is perfectly fine.
Step three: Add the dry ingredients. Stir in the flour and baking powder until there are no dry patches remaining. Stop once the batter is smooth. Mixing enthusiastically for another few minutes won’t improve it; it will only begin developing more gluten and can make the slice tougher. The finished batter will be considerably thicker than cake batter. This is expected.
Step four: Fold through the chocolate and raspberries. Stir in the white chocolate first, while the batter is easier to move. Add the raspberries last and fold them through gently.
Frozen berries will make the batter firmer as they cool the melted butter. Use a broad spatula or sturdy wooden spoon and turn the mixture over rather than stirring rapidly. Some raspberries will break, which gives the slice attractive berry streaks.
Step five: Fill the pan. Scrape the batter into the prepared pan and press it towards the corners. Because it is thick, it won’t level itself in the oven. Smooth the top with the back of a spoon or an offset spatula before baking. Try to distribute the raspberries evenly as you spread the batter.
Step six: Bake and cool. Bake until the top is lightly golden, the centre looks set and a skewer inserted into an area without melted chocolate comes out without wet batter. A few moist crumbs are fine.
Leave the raspberry slice in the pan briefly before transferring it to a wire rack. Allow it to cool completely before cutting. It continues to firm as it cools and slicing it while warm can leave you with crumbling edges and melted chocolate dragged across every piece.
Fresh Or Frozen Raspberries?
Both work, but they behave a little differently.
Frozen raspberries are economical, available throughout the year and firm enough to survive folding into the thick white chocolate slice batter. They also help keep their shape while the slice begins baking. Add them frozen and work fairly quickly once they are in the mixture.
Fresh raspberries are softer and can break more readily, particularly if they are very ripe. Fold them through carefully and don’t worry about a few crushed berries. The pink streaks are part of the charm.
This is also a useful recipe for raspberries that are no longer pristine but are still safe to eat. Remove any spoiled berries and use the remaining fruit before it becomes food waste. Softer berries may colour the batter more, but the flavour will still be lovely.
Tips For A Better Raspberry Slice
Don’t thaw frozen raspberries. Add them directly to the batter. Thawing releases juice and makes the berries much softer.
Add the raspberries last. Mix the chocolate through first so the berries receive as little handling as possible.
Expect a thick batter. It may become even firmer once the frozen fruit is added. This is normal, not a signal to add milk.
Line the pan. Even a well-greased pan can hold tightly around melted chocolate and cooked berry juice. Baking paper makes removal of the raspberry slice much simpler.
Use the correct pan size. A smaller pan creates a deeper slice that takes longer to cook. A larger pan produces a thinner slice that can dry out more quickly.
Cool it before cutting. For especially neat pieces, let the raspberry slice cool completely and use a large, sharp knife. Wipe the blade between cuts if melted chocolate or raspberry begins to build up.
Easy Raspberry Slice Variations
Use chopped white chocolate: Replace the chocolate chips with roughly chopped white cooking chocolate. Keep some pieces larger so you still get generous chocolate pockets.
Add lemon: Finely grated lemon zest adds a fresh citrus note without changing the consistency of the batter. Avoid adding a large amount of juice, as extra liquid can affect the texture.
Try mixed berries: Substitute a portion of the raspberries with blueberries or blackberries. Keep the total quantity of fruit approximately the same so the slice isn’t overloaded with moisture.
Make it extra chocolatey: Scatter a small handful of white chocolate chips over the top before baking. This looks inviting, although it does make an already sweet raspberry slice richer. Alternatively, you can stir half the listed chocolate through the batter and retain half to sprinkle over the top.
Finish with a drizzle: Once completely cool, drizzle the raspberry slice with melted white chocolate. Allow it to set before cutting or stacking the pieces.
Serve it as dessert: Warm individual pieces briefly and serve with vanilla ice cream, whipped cream or a spoonful of Greek yoghurt.
Raspberry Baking Recipe FAQ
Why is my raspberry and white chocolate slice batter so thick?
The batter is meant to be thick, and frozen raspberries make it firmer by cooling the melted butter. Don’t add extra liquid. Use a sturdy spoon or spatula to fold everything together, then press and smooth the mixture into the pan.
Is the a frozen raspberry recipe?
Yes. Add frozen raspberries directly from the freezer without thawing them. They generally hold their shape better than fresh berries while being folded through the batter.
Can I use fresh raspberries instead?
Yes. Fresh raspberries work well, but they are softer and more likely to break during mixing. Fold them through gently and accept that a few extra pink streaks may appear in the batter.
Is this raspberry slice a blondie?
It has similar flavours and ingredients, but the texture is lighter and more cake-like than a traditional dense, fudgy blondie. It falls comfortably between a blondie and a buttery baked slice.
Why did my slice turn pink?
The raspberries have released juice into the batter. This is more common when using thawed frozen berries or very soft fresh berries. It doesn’t affect the flavour, although adding frozen berries straight from the freezer will reduce the colour bleeding.
Can I reduce the white chocolate?
You can reduce it slightly if you prefer a less sweet slice, although the chocolate contributes to both the flavour and texture. I wouldn’t remove it entirely.
How do I cut the slice neatly?
Allow it to cool completely before lifting it from the pan. Use a large, sharp knife and make firm downward cuts rather than sawing back and forth. Wipe the knife between cuts as needed.
Can raspberry white chocolate slice be frozen?
Yes. Freeze individual pieces in an airtight container, separated with baking paper, for up to three months. Let them thaw while covered before serving.
Feedback and More: Did you try the raspberry white chocolate slice recipe? I’d love to know how it was. Select a star rating ⭐⭐⭐⭐⭐ or leave a comment below to let me know. Cheers, Elby!
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Raspberry White Chocolate Slice
*Note: Adjusting servings will not adjust the ‘light grey’ quantities
Ingredients
- 140 grams unsalted butter - melted and slightly cooled
- 160 grams granulated sugar
- 1 tsp vanilla extract
- ¼ tsp salt
- 2 large eggs - at room temperature
- 240 grams flour - plain
- 1 tsp baking powder
- 250 grams white chocolate chips
- 180 grams raspberries - frozen or fresh, see notes
Instructions
- Preheat oven to 170°C conventional or 155°C fan-forced. Grease a 27 x 18 cm slice pan and line with baking paper, leaving some paper extending over the sides.
- Add the melted butter, sugar, vanilla and salt to a large mixing bowl. Stir until combined, then add the eggs and whisk until the mixture is smooth.
- Add the flour and baking powder. Fold together until no dry patches remain, taking care not to overmix. The batter will be very thick.
- Fold through the white chocolate chips. Add the raspberries last and gently fold until they are reasonable evenly distributed. If using frozen raspberries, the batter will become even firmer as the berries cool the melted butter. This is normal.
- Spoon the batter into the prepared pan. Press it into the corners and smooth the surface with the back of a spoon or a spatula.
- Bake for approximately 45 minutes, or until the top is lightly golden and the centre is set. A skewer inserted into an area without a raspberry or chocolate chip (if you can find one) should come out without wet batter; a few moist crumbs are fine.
- Leave the slice in the pan for 10 minutes, then carefully transfer it to a wire rack. Cool completely before cutting into pieces.
Notes
Nutrition
*Nutrition and calorie figures are estimates only.
Delicious
Delicious! Definitely recommend
Highly recommend this dessert! So quick to prepare yet the finished product looks amazing & was a hit. I wondered if the raw batter was going to be too thick – but definitely wasn’t. Delicious & pretty.
So happy you all enjoyed it!
Was Awesome!
*icecream!
Made this to take to friends for dessert – was delicious with a scoop of vanilla icebreaker ?