Preheat stove burner to medium heat. Slice donuts in half lengthwise. Lightly butter the inner side of the donuts which have no glaze.
Place 2 donut slices in a pan, buttered-side down. Add a slice of cheese to each, then put remaining donut slices on top, buttered-side up. Cook for a few minutes until bottom of sandwich turns a golden brown. You can press gently down on top of each sandwich to help the cheese melt faster. Flip sandwiches over and repeat until both sides of the sandwich are toasted and cheese in the center is melted. Serve immediately.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.