Ingredients
Equipment
Method
Make the cake
- Preheat the oven to 350°F.
- Grease a 9x13-inch baking pan.
- Whisk the flour, sugar, cocoa powder, baking powder, baking soda, and salt together in a large bowl.
- In a medium bowl, whisk the eggs, buttermilk, oil, and vanilla extract.
- Whisk the egg mixture into the dry ingredients until smooth.
- Slowly whisk in the boiling water.
- Pour the thin batter carefully into the prepared pan.
- Bake for 30–35 minutes, until a toothpick inserted in the center comes out with a few moist crumbs.
- Cool the cake completely in the pan on a wire rack, about 1 1/2–2 hours.
Make the peppermint fudge topping
- Put the chocolate chips in a heatproof bowl.
- Heat the heavy cream in a small saucepan over medium-low heat for 3–5 minutes, until steaming with small bubbles at the edge.
- Pour the hot cream over the chocolate and let stand for 5 minutes.
- Stir the chocolate and cream until smooth.
- Stir in the peppermint extract.
- Pour the topping over the cooled cake.
- Spread the topping evenly.
- Sprinkle with the crushed peppermint candies.
- Let the topping set for 30 minutes before serving.
Notes
For neat slices, let the topping set fully before cutting. Refrigerate covered for up to 4 days; freeze portions for up to 2 months. For a dairy-free variation, use dairy-free buttermilk, cream, and chocolate.
