Instructions

1. Preheat oven to 350 degrees F. Spray a 13x9 baking dish with baking spray (or use our homemade cake release). Set aside.
2. In a bowl, combine flour, sugar, baking soda, and salt. Set aside.
3. In a small saucepan, heat Coca-Cola on low until it reduces to about ½ cup. Use a measuring cup to accurately measure (and discard the extra).
4. Add the butter and cocoa to the saucepan with the Coke and whisk until the butter is melted and the cocoa is dissolved completely. Remove from heat and cool for 5 minutes.
5. Once cooled, combine the Coke mixture to the flour mixture. Add in eggs, buttermilk, and vanilla. Use a mixer and beat until well blended.
6. Pour the cake batter into the prepared pan. Bake for 30 minutes, or until a toothpick comes out clean.
7. While the cake is baking, prepare the frosting. In a small saucepan over medium heat, pour in the second can of Coca cola. Reduce to ½ cup (discard excess).
8. Add butter, vanilla, and cocoa to the coca cola and whisk until butter is melted and mixture is smooth. Remove from heat.
9. Add in powdered sugar, ½ cup at a time, whisking until dissolved. Repeat until all the sugar has been added.
10. Pour the frosting over the baked cake (cake can be slightly warm still).
11. Cool completely before serving.