Spray the indentations and rims of the muffin tins with cooking spray. If using silicone molds spray with cooking spray and arrange on a rimmed baking pan.
Whisk the flour, ½ cup of the grated cheese, the sugar, baking powder, paprika and salt in a medium bowl until blended; set aside.
In a large bowl, whisk the egg and sour cream until smooth. Whisk in the milk and oil. Using a wooden spoon stir the flour mixture into the egg mixture until moistened.
Fill the prepared tins or silicone molds three-quarters full. Sprinkle 1 teaspoon of the remaining cheese over each muffin.
Bake in Sun Oven until muffins are pale brown with rounded cracked tops and a toothpick inserted into the center of one muffin comes out clean, about 40 minutes.