Chocolate Sponge Cake

• 4 large eggs, room temperature

• ¾ cup granulated sugar

• ¾ cup all-purpose flour

• ¼ cup unsweetened cocoa powder

• 1 teaspoon baking powder

• ¼ teaspoon salt

• 2 tablespoons vegetable oil

• 1 teaspoon vanilla extract

Peanut Butter Filling

• 1 cup creamy peanut butter

• ½ cup unsalted butter, softened

• 1 cup powdered sugar

• 1 teaspoon vanilla extract

• 2–3 tablespoons heavy cream (as needed for smoothness)

Chocolate Coating

• 8 ounces semi-sweet chocolate, finely chopped

• ½ cup heavy cream

• 1 tablespoon unsalted butter