32 ounces vanilla Greek yogurt
3/4 cup smooth peanut butter
9-inch crust of your choice (Oreo, graham cracker, etc.)

In a large mixing bowl, stir the yogurt and peanut butter with a wire whisk until blended. Spread into the prepared pie shell. Chill the pie overnight (the pie will be thicker the longer it is chilled). Serve with chopped peanut butter cups or whipped cream, if desired.