Strawberry Birthday Cake with Jammy Berry Filling

Strawberry Birthday Cake

Vanilla cake layers, a jammy strawberry filling, and pale pink strawberry cream cheese frosting make up this two-layer birthday cake. The strawberry flavor comes from the filling and frosting rather than the cake batter. Freeze-dried berries give the frosting its flavor and color without adding liquid.

Cook the filling until thick, then cool it before spreading it inside a ring of frosting. That border helps keep the berries between the layers. Finish the round cake with broad frosting swirls, two fresh strawberries, and a wedge cut for serving. Makes 12 slices; allow about 4 hours total, including cooling and chilling.

Ingredients for Strawberry Birthday Cake

For the Cake

• 2 1/2 cups all-purpose flour (315g)
• 1 3/4 cups granulated sugar (350g)
• 2 1/2 teaspoons baking powder
• 1 teaspoon fine salt
• 1/2 cup unsalted butter, softened (115g)
• 3 large eggs
• 1/2 cup sour cream (120g)
• 3/4 cup whole milk (180g)
• 2 teaspoons vanilla extract

For the Strawberry Filling

• 1 pound fresh or thawed frozen strawberries, hulled and chopped (450g)
• 1/3 cup granulated sugar (65g)
• 1 tablespoon cornstarch
• 1 tablespoon lemon juice

If using frozen strawberries, thaw and drain them first. They may need a little longer on the stove to cook down.

For the Frosting and Garnish

• 16 ounces cream cheese, softened (450g)
• 1 cup unsalted butter, softened (225g)
• About 5 cups powdered sugar, sifted (600g)
• 1 ounce freeze-dried strawberries, finely ground (30g)
• 2 medium fresh strawberries with green tops
• Optional: 1 or 2 drops pink food coloring, only if needed for a soft pink shade

How to Make Strawberry Birthday Cake

1. Prepare the pans: Heat the oven to 350°F (175°C) with a rack in the center. Grease two matching 8-inch round cake pans and line their bottoms with parchment.
2. Cook the filling: Combine the chopped strawberries, sugar, and lemon juice in a small saucepan over medium heat. Stir regularly as the berries soften and release their juices. Let a spoonful of the juice cool in a small bowl, whisk in the cornstarch until smooth, then stir it into the pan. Simmer gently, uncovered, for about 8–12 minutes, until the filling is glossy and jammy, with soft berry pieces. It should briefly hold a line when stirred, with no watery puddle. Cool completely.
3. Mix the batter: Whisk the flour, baking powder, and salt in a bowl. In another bowl, beat the butter and sugar until creamy, then beat in the eggs and vanilla. Stir the sour cream and milk together. Add them to the butter mixture in alternating additions with the dry ingredients, beginning and ending with the dry ingredients. Mix only until no flour pockets remain; prolonged mixing can make the layers dense.
4. Bake the layers: Divide the batter evenly between the pans and bake for about 30–35 minutes. Begin checking at 28 minutes. The centers should spring back lightly, and a wooden pick inserted into the center should come out clean or with a few moist crumbs, not wet batter. The edges may just begin to pull away from the pans. Use these cues rather than color or the timer alone; a different pan size or batter depth will change the bake time.
5. Cool the cakes: Let the layers rest briefly in their pans, then turn them out onto wire racks. Cool completely, at least 1 hour, before filling or frosting.
6. Make the frosting: Grind the freeze-dried strawberries to a fine powder. Beat the cream cheese and butter until smooth, then gradually beat in the powdered sugar and strawberry powder until pale pink and spreadable. The frosting should hold soft spatula ridges. Add the optional coloring only if needed, and chill the frosting briefly if it becomes too soft.
7. Fill and stack: Set one cooled layer on a serving plate. Using a piping bag or a zip-top bag with a corner snipped off, pipe a continuous ring of frosting around its edge. Spread the completely cooled filling inside the ring, then add the second layer. Chill for 20–30 minutes, until the stack feels stable.
8. Frost and garnish: Spread the remaining frosting over the top and sides, making broad, casual swirls across the top. Place the two fresh strawberries near the center with their green tops intact. Cut one triangular wedge for serving, leaving it close to the cake so the cut remains visible.

How to Keep the Layers Stable

If the filling still runs like syrup, simmer it uncovered a little longer before cooling it. Warm or loose filling can escape the frosting border and make the top layer slide. The cake layers must also be fully cool before assembly; if the frosting softens while you work, return it or the stacked cake to the refrigerator briefly.

Fresh strawberries go in the cooked filling rather than directly into this cake batter, where their extra moisture could affect the crumb. For a different formula with strawberry-flavored layers, see this fresh strawberry cake with cream cheese frosting.

Make-Ahead and Storage

Make the cake layers and compote ahead, then keep them covered and chilled separately. Let the layers come to a cool, workable temperature before assembling. Fully cooled, unfrosted layers can also be wrapped well and frozen; thaw them while wrapped.

Cover and refrigerate the assembled cake and use it within about 4 days. For cleaner slices, cut the chilled cake with a sharp knife, wiping the blade between cuts. Let slices sit briefly at room temperature if you prefer softer frosting. Freezing the assembled cake may affect the frosting and fresh berries; if you do freeze it, add the berry garnish after thawing.

Nutrition

Approximate nutrition per serving, based on 1 of 12 slices: 850 calories, 10g protein, 40g fat, and 115g carbohydrates. Approximate nutrition per 100g: 350 calories, 4g protein, 16g fat, and 46g carbohydrates. Values vary with ingredients and slice size.