Step 1

In a saucepan, melt the butter over medium heat. Stir in the pudding mixes and milk. Continue to stir and bring the mixture to boiling, letting it boil for 1 minute. The mixture will start to thicken quite a bit and won't look very smooth, but that's ok!

Step 2

Remove the pan from heat and add the powdered sugar. Use an electric mixer to beat in the sugar until the mixture is smooth. Add the vanilla and mix just until combined.

Step 3

Pour the mixture into a buttered 8X8 pan. Chill for about 2-3 hours or until fudge sets and can be cut into squares.