Giant Custard Filled Donut Cake

Recipe: For cake: 1 (18.25 ounce) package french vanilla cake mix 1 (5.9 ounce) package instant vanilla pudding mix 1 cup greek yogurt or sour cream 3/4 cup vegetable oil 4 eggs 1/2 cup warm water 1/2 batch of Chocolate ganache, recipe sprinkles of choice Pudding: 1 (5.9 ounce) package instant vanilla pudding mix (made…