1-First: whisk the 3 tablespoons of hot cocoa powder into the 1 cup of whole milk at room temperature until smooth, setting the base for that rich flavor.

2-In a separate bowl: mix the dry ingredients: 2 cups all-purpose flour, 1 1/2 cups granulated sugar, 2/3 cup unsweetened natural cocoa powder, 2 teaspoons baking soda, 1 teaspoon baking powder, and 1/2 teaspoon salt. This step blends everything evenly for a consistent texture.

3-Next: add the wet ingredients to the mix: pour in the 1/2 cup vegetable oil, 2 large eggs at room temperature, and 1 1/2 teaspoons pure vanilla extract, followed by the hot cocoa milk mixture. Slowly incorporate the 1 cup hot water while stirring to create a smooth batter that promises moist layers. Pour the batter into prepared pans and bake for 35-40 minutes, checking with a toothpick for doneness.

4-For the peppermint buttercream: start by creaming the 2 cups unsalted butter until fluffy, then gradually add 7 cups powdered sugar, 1 teaspoon pure vanilla extract, 3/4 teaspoon pure peppermint extract, 3 tablespoons whole milk, and 1/4 teaspoon salt. If you want a pop of color, mix in some red food coloring gel. To assemble, place one cake layer on a turntable and pipe alternating concentric rings of red-tinted buttercream and 3 ounces marshmallow creme for that striped effect.

5-Stack the layers, apply a crumb coat with the red buttercream, and chill to set. Finish by frosting with untinted buttercream, using a cake comb for red and white stripes, then pipe peppermint swirls on top. Add crushed candy canes and mini marshmallows just before serving to keep them crisp.