-
Preheat oven to 350 degrees. Grease two mini loaf pans.
-
In a small mixing bowl, whisk together the dry ingredients. Set aside.
-
In the bowl of a mixer, beat the butter and sugar together until fluffy, about 3-5 minutes. Add the egg and beat for another minute. Add the peanut butter and bananas, and mix until combined.
-
Fold in the dry ingredients, stirring just until combined.
-
Pour into the two pans. Drop the jam on top of the batter in a few large dots and swirl gently with a knife or fork.
-
Mix the streusel ingredients together until well-combined and crumble over the tops of the loaves.
-
Bake for 35-40 minutes, or until a toothpick comes out cleanly and the bread is starting to pull away from the sides of the pan.
-
Let cool, then remove and eat (obviously).