
This white chocolate raspberry cake is a celebration dessert that balances sweet and tart flavors in every bite. With fluffy white cake layers, a vibrant raspberry filling, and a silky white chocolate buttercream, it is perfect for birthdays, special gatherings, or when you simply want a showstopper cake. Every step is designed for an impressive yet approachable homemade treat.
Ingredients
- Fresh or frozen raspberries: provide tart flavor and vivid color for the filling Choose firm berries with no bruises or excess moisture
- Granulated sugar: sweetens both the filling and the cake itself Use pure white sugar for even color and flavor
- Lemon juice and zest: bring out the brightness in both cake and raspberry filling Always use fresh lemons for zesting to avoid bitterness
- Cake flour: keeps the cake layers fluffy and tender Sift if your flour clumps easily
- Unsalted butter: gives richness and lets you control the salt content Quality butter matters for the best crumb
- Egg whites: contribute to a pure white color and assured lightness Use carton whites or separate them from whole eggs carefully
- Full-fat sour cream: adds moisture and tang to keep the crumb from drying out Look for brands without stabilizers
- Vegetable or canola oil: gives an extra-flexible crumb and helps the cake stay soft
- Vanilla extract or vanilla bean paste: builds depth Pick pure extract for warmth and aromatic notes
- Baking powder: offers reliable rise for even layers Make sure your powder is fresh
- Fine salt: balances sweetness and impacts overall flavor Use a small grind for even distribution
- Powdered sugar: is key in the white chocolate buttercream Sift before mixing for smoothest results
- Heavy whipping cream: provides frosting with richness and helps adjust consistency
- White chocolate chips: deliver a creamy vanilla sweetness Choose high quality chips for best melt and flavor
Step-by-Step Instructions
- Prepare Raspberry Filling:
- Place raspberries sugar lemon juice lemon zest and water in a saucepan Heat over medium-high stirring until it boils Lower to simmer and cook ten to fifteen minutes until thickened Pour into a metal strainer over a bowl using a rubber spatula to press out all the liquid Discard the seeds unless you prefer them Mix cornstarch with remaining water to make a slurry and stir into the strained liquid Rinse out saucepan pour filling back in and heat again stirring until bubbling and thickened Transfer to a bowl cover and chill for at least an hour
- Make the White Cake Layers:
- Preheat oven to 340 degrees Line and grease your cake pans with parchment Add butter and sugar to stand mixer and whisk on high speed for several minutes until light and creamy In a second bowl whisk flour baking powder and salt Add half the dry mix to the butter sugar mixture and blend Mix in sour cream egg whites oil lemon juice lemon zest and vanilla then the rest of the dry mix Stir until just smooth Split batter evenly among pans Bake thirty-eight to forty-two minutes until a toothpick shows a few crumbs Rotate pans during baking Cool in pans ten minutes then run a spatula around the edges Freeze layers for forty-five minutes to chill completely Trim tops as needed
- Simple Syrup:
- Combine water and sugar in a saucepan Cook over medium stirring until boiling and clear Remove from heat and cool to room temp Use a brush to coat cake layers before assembling for extra moisture
- Prepare White Chocolate Buttercream:
- Beat butter until smooth then add lemon juice zest vanilla and salt Mix on low while gradually adding powdered sugar Halfway through pour in cream to loosen it Beat in melted cooled white chocolate Continue beating until very smooth Add more cream for thinner or more sugar for thicker Stir by hand for the silkiest finish
- Assemble the Cake:
- Brush cooled cake layers with syrup Place first layer on a cake board and spread on an even layer of buttercream Pipe a border and spoon raspberry filling inside Continue stacking with frosting and filling Chill cake briefly to set layers Cover entire cake with a crumb coat of frosting chill again then finish with a thick smooth layer Decorate with colored buttercream raspberries or flowers

Storage Tips
Assembled frosted cake keeps well in the fridge for up to a week The buttercream seals in moisture making every slice taste fresh slices store best if covered with extra buttercream or plastic wrap
You can freeze both unfrosted cake layers and finished cake layers for up to a month Always wrap tightly in plastic and thaw overnight in the fridge
Ingredient Substitutions
Fresh or frozen raspberries work equally well for the filling If using frozen add them straight to the saucepan without thawing
You can swap vanilla extract with almond extract for a subtle nutty flavor
If you do not have cake flour you can substitute with all purpose flour plus a tablespoon of cornstarch for each cup
For a dairy free option swap sour cream and butter with plant-based versions and use a dairy free white chocolate
Serving Suggestions
This cake needs only a handful of fresh raspberries or thin lemon slices on top to look beautiful It pairs perfectly with berry tea or a glass of sparkling wine Serve slices at room temperature for best texture
Cultural and Historical Context
White chocolate raspberry cake is inspired by classic American party cakes where fruit and creamy frostings meet At many family gatherings and brunches these layered cakes are the centerpiece of the dessert table Raspberry and lemon together feel reminiscent of summer picnics and garden parties
Frequently Asked Questions
- → How do I make the raspberry filling thicker?
Simmer the raspberries with sugar and bring to a boil, then stir in a cornstarch slurry. Continue cooking while stirring until the mixture thickens and coats a spoon.
- → Can I use frozen raspberries instead of fresh?
Frozen raspberries work equally well; just simmer them straight from frozen and adjust sweetness if needed.
- → What is the secret to fluffy white cake layers?
Whip butter and sugar well, use only egg whites for color, and mix the batter gently once flour is added to retain air and softness.
- → How do I keep the cake moist?
Brush each cooled cake layer with simple syrup before assembling to lock in moisture throughout the cake.
- → Can I make the cake ahead of time?
Absolutely! Freeze unfrosted cake layers or store the frosted cake in the fridge. Fillings and buttercream can also be prepared in advance.
- → How should I decorate the finished cake?
Try piping different shades of buttercream for texture, or top with fresh raspberries and flowers for an elegant presentation.