Preheat the oven to 425 degrees. Whisk together the flour, baking powder, baking soda and salt in a large bowl. Cut the butter into the flour mixture with a pastry cutter until well combined. Stir in the cheddar cheese, jalapenos and sour cream until it forms a sticky dough. Clean and flour your counter top. Pat the dough out to a 1/2 inch thickness and use a biscuit cutter to cut out rounds. Bake on an ungreased baking sheet for 15-17 minutes.