Step 1

Preheat the oven to 350 degrees Fahrenheit. Grease the cookie sheets with oil or butter, or line with a silicone mat, parchment paper, or aluminum foil.

Step 2

Stir the peanut butter and granulated and brown sugars in a bowl until smooth. Beat in the eggs, one at a time. Stir in baking powder, salt, and vanilla. Expect a firm dough.

Step 3

Using a cookie scoop, form the dough into 1-inch balls. Place them on the prepared cookie sheets, 2 inches apart. Make a criss-cross indentation by pressing a fork into the balls horizontally then vertically.

Step 4

Bake for 8 to 10 minutes. Let cookies cool on the cookie sheets for 5 minutes, then cool completely on a wire rack.