Preheat oven to 450 degrees.
In a large mixing bowl, combine the Bisquick Mix, buttermilk, and sugar.
Add the melted tablespoon of butter into the batter. Stir until a soft batter forms.
Turn out onto a well floured work surface.
Knead 20 times (this is a very forgiving dough), and don't be afraid to get additional flour into the dough.
Roll out to 1/2" thick (or thicker if you prefer towering biscuits).
Using a biscuit cutter or whatever cutter size you desire, cut out the biscuit rounds.
Place biscuits close together on an ungreased baking sheet. Brush tops with melted butter. Bake for 8-10 minutes or until golden brown. Remove from oven and brush biscuit tops with melted butter again.
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