01 - Preheat oven to 350°F. Grease and flour two 9-inch round cake pans.
02 - Sift together flour, cocoa powder, sugar, baking powder, baking soda, and salt in a large bowl.
03 - Add eggs, milk, oil, and vanilla to the dry ingredients. Beat on medium speed until well combined.
04 - Gradually add boiling water while mixing until the batter becomes smooth (the consistency will be thin).
05 - Divide batter evenly between prepared pans. Bake for 30-35 minutes until a toothpick inserted in the center comes out clean.
06 - Let cakes cool in pans for 10 minutes, then turn out onto a wire rack to cool completely.
07 - Heat cream in a small saucepan until it just begins to simmer. Pour over chopped chocolate in a bowl. Let sit for 2-3 minutes, then stir until glossy and smooth. Cool until thickened but spreadable.
08 - Toss sliced strawberries with sugar if desired. Let sit for 10 minutes to soften slightly.
09 - Spread a layer of ganache over the first cake layer, top with half the sliced strawberries. Place second cake layer on top, spread remaining ganache evenly, and arrange additional strawberries on top. Decorate with extra whole or halved strawberries.
10 - Refrigerate for at least 30 minutes before slicing to ensure clean layers.