PEANUT BUTTER MUFFINS

Steps:

• Place rack in center of oven and preheat to 400 degrees F.
• Lightly spray the 12 indentations of a standard muffin tin with nonstick spray, or line each indentation with a paper muffin cup; set aside.
• Whisk the flour, graham cracker crumbs, baking powder, and salt, if using, in a medium bowl; set aside as well.
• Beat the peanut butter, sugar, and butter together in a large bowl with an electric mixer at medium speed until smooth, about 1 minute.
• Beat in the egg, then the egg white, and finally the vanilla until smooth.
• Scrape down the sides of the bowl with a rubber spatula and beat in the milk until creamy and light, about 1 minute.
• Remove the beaters and stir in the prepared flour mixture with a wooden spoon or a rubber spatula, just until moistened. The batter may still be grainy but no white pockets of flour should be visible.
• Fill the muffin-tin indentations three-quarters full. Reserve any leftover batter for a second baking.
• Bake until golden and a toothpick inserted into one of the muffins comes out dry, about 20 minutes.
• Cool the muffins in the tin on a wire rack for 5 minutes, then pop the muffins out of the tin and cool completely on the rack.
• They can be stored in an airtight container for up to 3 days. Or place them in a zip-closed plastic bag and freeze for up to 4 months.