Preheat oven to 400° F degrees.
In a large bowl, beat your egg.
Add in your sour cream and sugar then mix until fully incorporated.
1 cup sour cream, 1 tablespoon sugar
Using a grater (such as a cheese grater), grate your butter into the bowl.
¼ cup butter
Add in your remaining ingredients (flour, baking soda, and salt). Mix.
2 teaspoon baking soda, ¾ teaspoon salt, 2 cups flour
Lightly flour a clean counter surface or cutting board. Place your dough mixture onto the flour surface.
Lightly flour your rolling pin and roll out your dough until it’s about 1 inch thick.
Use the opening of a wide-mouth 16 oz mason jar as your biscuit cutter. (If you use something that is smaller or bigger, that’s fine! It might change the number of biscuits.)
Lightly grease a sheet pan with cooking spray and place each biscuit on it.
Cook for about 15 minutes at 400°F degrees.
Remove from oven and enjoy!