This is the BEST recipe. The cupcakes are amazing! You could use strawberries as well.
1 box white cake mix (recommended: Duncan Hines Moist Deluxe)
1 1/3 cups water
3 large eggs whites
2 tablespoons unsalted butter, melted
2 teaspoons almond extract
2 teaspoons vanilla extract
1 small container fresh raspberries
1 cup heavy whipping cream
1/3 cup powdered sugar, plus additional for dusting
Line 18 muffin cups with muffin papers. Preheat the oven to 350 degrees F. Using an electric mixer, beat the cake mix, water, egg whites, melted butter, almond extract, and vanilla extract in a large bowl for 2 minutes, or until the batter is well blended. Using about 1/3 cup of batter for each cupcake, spoon the batter into the prepared muffin cups. Bake the cupcakes until they are very pale golden on top, about 15 minutes. Cool the cupcakes completely on a cooling rack.
Using a fork, coarsely mash the container of raspberries in a medium bowl (Save a few whole raspberries for garnish if desired. Beat the cream and 1/3 cup of powdered sugar in a large bowl until firm peaks form. Fold the mashed raspberries into the whipped cream.
Remove the muffin papers from the cupcakes and cut the tops off of each cupcake. Spoon the raspberry whipped cream atop the cupcake bottoms. Place the cupcake tops on the cupcakes. Dust with more powdered sugar and serve with the remaining berries.