Celebrate St Patrick's Day with Guiness Cake! | Chef Terry

I decided to modify my Grandmother Cola Cake to use Guiness. This comes out moist and delicious I Hope you enjoy my Guiness Cake Happy St Patricks Day
Guiness Cake
2 cups Guiness Extra Stout
3 cups Mini Marshmallows
2 tablespoons Butter
4 cups All Purpose Flour
6 tablespoons Cocoa Powder
2 teaspoons Baking Powder
1 cup Milk
1 cup Neutral Flavored Oil
4 Eggs
Vanilla

Cream Cheese Frosting
v16 oz Cream Cheese (Room Temp)
8 oz Butter (Also Room Temp)
2 lbs Powdered Sugar
Vanilla
Optional Gel based Green Food Coloring