Root Beer Bundt Cake

2 cups root beer (don’t use diet root beer) 
1 cup unsweetened cocoa powder 
1/2 cup unsalted butter 
1 1/4 cups sugar 
1/2 packed brown sugar 
2 cups flour 
1 1/4 tsp baking soda 
1 tsp salt 
2 eggs 
1 1/2 tsp root beer concentrate 

1. Preheat oven to 325F. Grease a bundt pan. 
2. In a small saucepan over medium heat, heat root beer, cocoa powder and butter until butter is melted. Add sugars and whisk until dissolved. Remove from heat and let cool. 

3. Whisk together flour, baking soda and salt. 
4. Whisk eggs until lightly beaten, and then whisk them into the cocoa mixture. Gently fold cocoa mixture into the flour mixture. 
5. Pour into bundt pan and bake for 35-40 minutes, or until an inserted toothpick comes out clean. Cool on a wire rack. 

2 ounces of semi sweet chocolate, melted and cooled 
1/2 cup unsalted butter, softened 
1/2 tsp salt 
1/4 cup root beer 
2/3 cup unsweetened cocoa powder 
2 1/2 cups icing sugar 

1. Beat butter until smooth. Mix in chocolate, salt and cocoa powder. 
2. Slowly beat in icing sugar until incorporated. Mix in root beer. 
3. Spread on cooled bundt cake.