Chocolate Cupcakes with Strawberry Filling

These chocolate cupcakes with strawberry filling have a deep cocoa crumb, a bright berry center, and a swirl of strawberry buttercream on top. The cupcakes are tender without being fragile, and the filling adds a burst of fresh flavor that keeps the dessert from feeling overly rich. Bake a batch for birthdays, showers, Valentine’s Day, or any ordinary afternoon that deserves a little celebration.

Why You’ll Love These Chocolate Strawberry Cupcakes

• Rich but balanced: Dark cocoa gives the cake depth while strawberries add brightness and gentle acidity.
• A surprise center: Each cupcake contains a spoonful of strawberry filling that stays soft and jammy after baking.
• Soft texture: Oil, buttermilk, and hot coffee create a moist crumb that stays tender for days.
• Pretty without fuss: A simple buttercream swirl and fresh berry garnish look bakery-worthy.
• Make-ahead friendly: Bake the cupcakes and prepare the filling a day before decorating.

Ingredients

For the cupcakes

• 1 cup all-purpose flour
• 1/2 cup unsweetened natural cocoa powder
• 3/4 cup granulated sugar
• 1/2 cup packed light brown sugar
• 1 teaspoon baking soda
• 1/2 teaspoon baking powder
• 1/2 teaspoon fine salt
• 1 large egg, room temperature
• 1/2 cup buttermilk
• 1/3 cup neutral oil
• 1 teaspoon vanilla extract
• 1/2 cup hot coffee or hot water

For the strawberry filling

• 1 1/2 cups finely diced fresh strawberries
• 1/4 cup granulated sugar
• 1 tablespoon lemon juice
• 1 tablespoon cornstarch
• 1 tablespoon cold water

For the buttercream

• 1 cup unsalted butter, softened
• 3 cups powdered sugar
• 1/3 cup freeze-dried strawberries, crushed to a powder
• 2 tablespoons heavy cream or milk
• 1 teaspoon vanilla extract
• Pinch of salt

Ingredient Notes

Use room-temperature egg, buttermilk, and butter so the batter and frosting mix evenly. Fresh strawberries are best for the filling because they cook into a bright, naturally fragrant jam. If the berries are very watery, simmer the filling an extra minute or two so it becomes thick enough to stay inside the cupcakes.

How to Make Chocolate Cupcakes with Strawberry Filling

1. Heat the oven. Preheat the oven to 350°F and line a 12-cup muffin pan with paper liners. If you have a second pan, keep it nearby because this recipe makes about 14 cupcakes.
2. Make the strawberry filling. Combine the diced strawberries, sugar, and lemon juice in a small saucepan over medium heat. Cook for 5 to 7 minutes, stirring occasionally, until the berries release their juice and soften.
3. Thicken the filling. Stir the cornstarch and cold water together in a small cup. Add the slurry to the berries and cook for 1 to 2 minutes, stirring, until thick and glossy. Cool completely before filling the cupcakes.
4. Mix the dry ingredients. Whisk the flour, cocoa powder, granulated sugar, brown sugar, baking soda, baking powder, and salt in a large bowl. Break up any cocoa lumps.
5. Combine the wet ingredients. In another bowl, whisk the egg, buttermilk, oil, and vanilla until smooth. Pour the wet mixture into the dry ingredients and stir just until no dry streaks remain.
6. Add hot coffee. Slowly pour in the hot coffee while whisking gently. The batter will be thin, which is exactly what helps the cupcakes bake up moist.
7. Fill and bake. Divide the batter among the liners, filling each about two-thirds full. Bake for 18 to 21 minutes, until the tops spring back and a toothpick inserted near the edge comes out with a few moist crumbs.
8. Cool fully. Let the cupcakes cool in the pan for 5 minutes, then move them to a rack. They must be completely cool before you add the filling or frosting.
9. Make the buttercream. Beat the softened butter for 2 minutes. Add the powdered sugar, crushed freeze-dried strawberries, cream, vanilla, and salt in stages. Beat for 2 to 3 minutes until light and fluffy.
10. Fill the centers. Use a small paring knife or cupcake corer to remove a 1-inch circle from the top of each cupcake. Spoon in about 2 teaspoons cooled strawberry filling, then replace a small piece of cake if desired.
11. Decorate. Pipe the strawberry buttercream over the filled cupcakes. Garnish with a thin strawberry slice or a sprinkle of freeze-dried berry powder.

Tips and Variations

• Do not overmix: Stir the batter only until the flour disappears so the cupcakes stay soft instead of chewy.
• Use hot coffee: Coffee intensifies chocolate flavor without making the cupcakes taste like coffee. Hot water works if you prefer.
• Make a shortcut filling: Good-quality strawberry preserves can replace the homemade filling, but choose a thick jam rather than a loose sauce.
• Try white chocolate: Melt 3 ounces white chocolate, cool it, and beat it into the buttercream for a creamy strawberry-vanilla finish.
• Add crunch: Sprinkle chopped toasted almonds or crushed chocolate cookies over the frosting.
• Make mini cupcakes: Fill mini liners about two-thirds full and bake for 10 to 12 minutes.
• Keep the filling hidden: If you want a completely smooth top, plug the center with the removed cake before piping.

For another chocolate-and-berry treat, try these chocolate-covered strawberries. If you want to compare cake textures, this classic chocolate cupcake recipe is a useful starting point, while vanilla cupcakes with buttercream offer a lighter alternative.

Storage and Serving

Store filled and frosted cupcakes in an airtight container in the refrigerator for up to 3 days. Let them stand at room temperature for 20 to 30 minutes before serving so the buttercream softens. Unfilled cupcakes can be kept at room temperature for 2 days, while the strawberry filling can be refrigerated for up to 5 days.

To freeze, wrap unfrosted cupcakes individually and freeze for up to 2 months. Thaw them overnight in the refrigerator, then bring them to room temperature before filling and decorating. Keep the finished cupcakes chilled if your kitchen is warm. Because the frosting contains dairy, the FDA’s food-allergy guidance is helpful when serving them at parties.

Frequently Asked Questions

How do I make chocolate cupcakes with strawberry filling?

Bake a moist cocoa cupcake, cook a quick strawberry-lemon filling until thick, cool both completely, then core each cupcake and spoon in the filling. Finish with strawberry buttercream.

Can I use frozen strawberries for the filling?

Yes. Thaw them first and drain excess liquid, then dice or crush them. Frozen berries may need a few extra minutes of cooking so the filling reaches a spoonable consistency.

Why did my cupcakes sink in the center?

Common causes include underbaking, opening the oven door too early, or overmixing the batter. Bake until the tops spring back and let the cupcakes cool undisturbed in the pan for 5 minutes.

Can I fill cupcakes without a corer?

Yes. Use a small sharp knife to cut a cone from the top, trim away part of the cone, spoon in the filling, and replace the cap before frosting.

Can I make these cupcakes ahead?

Prepare the filling and bake the cupcakes one day ahead. Store the filling covered in the refrigerator and keep the cooled cupcakes airtight. Make the buttercream and assemble them the day you plan to serve them.

A Pretty Dessert for Any Celebration

Arrange the cupcakes on a simple white platter so the pink frosting and dark chocolate crumb stand out. For a birthday, add colorful sprinkles; for a bridal or baby shower, use small fresh strawberry halves. A tiny dusting of powdered freeze-dried berries gives the tops a natural rosy finish without food coloring. Set one aside for yourself before guests arrive, because these usually vanish faster than expected.