# What You'll Need:
→ Chocolate Cake
01 - 2 cups all-purpose flour
02 - 3/4 cup unsweetened cocoa powder
03 - 2 cups granulated sugar
04 - 1 1/2 teaspoons baking powder
05 - 1 1/2 teaspoons baking soda
06 - 1 teaspoon salt
07 - 1 cup buttermilk, room temperature
08 - 1/2 cup vegetable oil
09 - 2 large eggs, room temperature
10 - 2 teaspoons vanilla extract
11 - 1 cup hot water
→ Peanut Butter Filling
12 - 1 cup creamy peanut butter
13 - 1/2 cup unsalted butter, room temperature
14 - 2 cups powdered sugar
15 - 1/4 cup heavy cream
16 - 1/2 teaspoon vanilla extract
→ Chocolate Ganache
17 - 1 cup semi-sweet chocolate chips
18 - 2/3 cup heavy cream
→ Pretzel Crunch
19 - 1 1/2 cups mini pretzel twists, lightly crushed
20 - 2 tablespoons unsalted butter, melted
21 - 2 tablespoons brown sugar
→ Decoration
22 - Whole or halved pretzels for topping, as needed
23 - Mini peanut butter cups (optional), as desired
# Step-by-Step Guide:
01 - Preheat oven to 350°F. Grease and line three 8-inch round cake pans with parchment paper; set aside.
02 - In a large bowl, whisk together the flour, cocoa powder, granulated sugar, baking powder, baking soda and salt until evenly blended.
03 - Add the buttermilk, vegetable oil, eggs and vanilla to the dry mix and stir until just combined. Pour in the hot water and mix until smooth; batter will be thin.
04 - Divide the batter evenly among the prepared pans and bake 25–28 minutes or until a toothpick inserted in the center comes out clean. Allow cakes to rest in pans 10 minutes, then invert onto wire racks to cool completely.
05 - Toss the crushed mini pretzels with melted butter and brown sugar. Spread in a single layer on a baking sheet and bake at 350°F for 7–9 minutes until caramelized; cool completely.
06 - Beat the peanut butter and unsalted butter together until smooth. Gradually add the powdered sugar, then mix in the heavy cream and vanilla. Continue beating until the filling is light and spreadable.
07 - Heat the heavy cream until just simmering. Pour over the chocolate chips in a heatproof bowl, let sit 2 minutes, then stir until glossy and smooth. Allow to cool slightly before using.
08 - Place one cake layer on a serving plate. Spread half the peanut butter filling over the layer and sprinkle with one third of the pretzel crunch. Repeat with the second layer and remaining filling and crunch, then top with the final cake layer.
09 - Pour the warm ganache over the top of the stacked layers, allowing it to drip down the sides. Press remaining pretzel crunch onto the top and garnish with whole or halved pretzels and optional mini peanut butter cups.
10 - Refrigerate the assembled cake for 30 minutes to set the ganache and filling for the cleanest slices; bring to room temperature for 10–15 minutes before serving if preferred.