Place bananas in a food processor and process. If the bananas are frozen hard, they will turn to crumbs first. This is good. You may have to stop and stir the bananas a few times as they tend to form a clump. (see notes)
At the “crumb” stage, add the honey peanut butter or a mix of the two. (You may add everything at the beginning but I find the peanut butter tends to stick more to the sides of the bowl and under the blade when it is added at the beginning.)
Enjoy immediately as you would soft serve ice cream or store in freezer. This will freeze hard like regular ice cream. When I make extra to store in the freezer, I let it sit at room temperature a few minutes to soften before serving.