FOR THE CAKE
1 1/2 c. (3 sticks) butter, softened
1 c. granulated sugar
6 large eggs
2 tbsp. vanilla extract
2 boxes yellow cake mix
1 c. whole milk
beat sugar and butter until smooth then eggs one at a time until smooth. start adding cake mix small amounts and milk blend very well. Pour batter into greased bundt pan and smooth top with a rubber spatula.
Bake until a toothpick inserted into the middle of the cake comes out clean, about 55 minutes at 125 Let cool in pan 10 minutes, then invert onto a cooling rack to cool completely.
For the glaze:
2 cups powdered sugar
3 tbsp milk
1 tsp vanilla extract
In a small bowl, whisk together the powdered sugar, milk, and vanilla until smooth. Pour over the cooled cake.