Preheat oven to 400°F. Line 12 muffin cups with muffin papers. Stir first 4 ingredients in small bowl to blend. Using electric mixer, beat bananas, honey, peanut butter, eggs, oil, sugar and vanilla in medium bowl to blend. Beat in flour mixture. Divide batter among muffin cups.
Bake muffins until tester inserted into center comes out clean, about 20 minutes. Transfer muffins to rack; cool.
