• 1 package Pillsbury yellow cake mix
• 1/4 cup water
• 4 large eggs
• 1/4 cup canola oil
• 1 small package instant pistachio pudding mix
• 1 cup sour cream

Sugar Mixture:

• 1 cup brown sugar
• 1 teaspoon cinnamon
• 1/2 cup chopped walnuts or pecans

Glaze, optional:

• 1 cup powdered sugar
• 3-4 tablespoons milk or heavy cream