01 -
Preheat oven to 180°C (350°F). Grease and line three 8-inch baking pans with parchment paper.
02 -
In a large bowl, whisk together flour, sifted cocoa powder, baking powder, baking soda, kosher salt, and granulated sugar.
03 -
Add eggs, buttermilk, vegetable oil, and vanilla extract to the dry ingredients and mix until nearly combined.
04 -
Stir in the hot coffee until the batter is smooth and no lumps of flour remain.
05 -
Divide the batter evenly among the prepared pans and bake for 25–30 minutes, or until a toothpick inserted comes out clean.
06 -
Let the cakes cool completely before applying the frosting.
07 -
In a bowl, beat powdered sugar, butter, sifted cocoa powder, heavy cream, vanilla extract, and salt until smooth. Add caramel sauce and whip on high until fluffy.
08 -
Place a small amount of frosting on the serving surface. Set the first cake layer on top.
09 -
Pipe a frosting ring around the edge of the first layer, fill with frosting, and spread smooth. Fill the center with 1/3 cup caramel sauce. Repeat with remaining layers.
10 -
Frost the top and sides of the cake with remaining frosting. Slice and serve.