Homemade Boston Cream Donuts

"Make Boston cream donuts at home with this recipe. You will love the golden brown donut filled with a custard filling and topped with a chocolate glaze. Most of the ingredients in this recipe are standard pantry staples like yeast, flour, sugar, salt, etc. However, you will need to make sure you have plenty of oil to fry them up. The chocolate glaze also calls for unsweetened chocolate, which is not always kept on hand by the average person. "