Peanut Butter Cookies
Place an oven rack in the middle position and preheat the oven to 350 degrees F.
In a large bowl, beat together the butter and peanut butter until very smooth. Add brown sugar and Splenda and beat until well-combined and light in color. Gradually beat in the egg and vanilla extract, beating until very smooth and a little fluffy. Mix in the flour and baking powder, beating until a moist but cohesive dough forms. Stir in peanuts. Drop by tablespoon about 2” apart on non-stick baking sheet. Using the tines of a fork dampened in cold water, flatten each in a cross-hatch pattern until 2” in diameter. Bake until golden brown, 22 to 25 minutes.