½ cup butter (1 stick)
½ cup shortening (Crisco)
1 cup creamy peanut butter (or crunchy) (I used crunchy)
1 cup granulated sugar
1 cup packed light brown sugar
2 large eggs
2-1/2 cups all-purpose flour
1-1/2 teaspoon baking soda
1 teaspoon baking powder
½ teaspoon salt
1 teaspoon vanilla
2 cups semi-sweet chocolate chips
Cream butter, shortening, peanut butter, granulated sugar, brown sugar and egg until well blended, add vanilla. Stir together (or sift) flour, soda, baking powder and salt, add to creamed butter mixture.
Stir in chocolate chips. Drop by rounded teaspoons on an ungreased cookie sheet.
Bake at 375 F for 10 to 12 minutes.
Remove to wire rack and cool completely.