Banana Oatmeal Muffins

Step 1
Preheat the oven to 325 degrees F (165 degrees C). Line 12 muffin cups with papers liners.

Step 2
Beat sugar and butter with an electric mixer in a large bowl until smooth and creamy. Beat first egg into butter mixture until completely blended; beat in vanilla extract with remaining egg.

Step 3
Mix bananas, milk, and allspice together in a separate bowl; stir into creamed butter mixture. Whisk flour, baking powder, baking soda, and salt together in a separate bowl; slowly stir into banana-butter mixture until batter is just mixed. Fold oats and walnuts into batter.

Step 4
Scoop batter into the muffin cups using a large ice-cream scoop.

Step 5
Bake in the preheated oven until a toothpick inserted in the centers of the muffins comes out clean, 25 to 35 minutes.