01 - Preheat oven to 350°F (175°C). Grease and flour two 9-inch round cake pans, then line the bottoms with parchment paper for easy release.
02 - In a large mixing bowl, sift together the all-purpose flour, granulated sugar, unsweetened cocoa powder, baking powder, baking soda, and salt until well combined and free of lumps.
03 - Add the eggs, whole milk, vegetable oil, and vanilla extract to the dry mixture. Beat on medium speed until fully incorporated. Gradually pour in the boiling water while mixing on low — the batter will be quite thin, which is expected.
04 - Divide the batter evenly between the two prepared pans. Bake for 30–35 minutes, or until a toothpick inserted into the center comes out clean. Let the cakes rest in the pans for 10 minutes, then invert onto wire racks to cool completely.
05 - While the cakes bake, toss the hulled and sliced strawberries with granulated sugar and fresh lemon juice in a bowl. Set aside for at least 20 minutes to allow the fruit to release its juices and develop flavor.
06 - In a small saucepan, heat the heavy cream just until it begins to simmer — do not boil. Remove from heat and pour over the chopped semisweet chocolate in a heatproof bowl. Let stand for 2 minutes, then stir gently from the center outward until smooth and glossy. Allow to cool slightly until it reaches a thickened but still pourable consistency.
07 - If using the whipped cream topping, beat the heavy whipping cream with powdered sugar and vanilla extract in a chilled bowl until soft peaks form. Be careful not to overwhip.
08 - Place one cooled cake layer on a serving platter. Arrange a generous layer of the macerated strawberries over the top, reserving a few for garnish. Drizzle with half of the chocolate ganache. If desired, spread a layer of whipped cream over the strawberries.
09 - Carefully position the second cake layer on top. Pour the remaining ganache over the surface, guiding it gently so it drips down the sides. Arrange the reserved strawberries on top as garnish.
10 - Refrigerate the assembled cake for at least 1 hour to allow the layers and ganache to set properly. Slice into portions and serve chilled.