Ingredients
Cooking spray
Cocoa powder
1 box chocolate cake mix, plus ingredients called for on box
1 (14-oz.) can sweetened condensed milk
1 c. semisweet chocolate chips, melted
Chocolate shavings, for garnish
1 c. butter, softened
2 1/2 c. powdered sugar
3/4 c. cocoa powder
2 tsp. pure vanilla extract
Pinch of kosher salt
1/4 c. heavy cream (plus more if necessary)
Preparation
Step 1Make cake: Preheat oven to 350º. Grease a 9"-x-13" pan with cooking spray and dust with cocoa powder. Prepare chocolate cake mix according to package directions and bake until a toothpick inserted in the center comes out clean, 25 to 30 minutes. Let cool completely.Step 2Poke cake all over with the handle of a wooden spoon. In a small bowl, mix together sweetened condensed milk and melted chocolate. Pour mixture into the holes. Step 3Make frosting: In a large bowl using a hand mixer, beat butter, powdered sugar, cocoa powder, vanilla, and salt. Beat in heavy cream, adding more by the tablespoon until consistency is creamy but can hold peaks.Step 4Spread frosting all over cake with an offset spatula and sprinkle with chocolate shavings.
