Step 1

Preheat your oven to 350° F and spray a 9 x 13 baking dish with non-stick spray. Set aside.

Step 2

In a large bowl, add the cake mix, egg whites, oil, water, and pistachio pudding mix. Use an electric mixer to beat on medium until fully combined.

Step 3

Pour into the prepared pan and sprinkle the chopped pecans evenly on top.

Step 4

Bake for 30-40 minutes or until a toothpick inserted into the center comes out clean.

Step 5

While the cake is baking, make the frosting.

Step 6

In a medium microwave safe bowl, melt the butter and then add the powdered sugar, vanilla, and water. Whisk together until smooth.

Step 7

Once cake is cooled, poke holes into the top and pour frosting over the top letting it run through and sink in.

Step 8

Slice and serve.