Flourless Double Chocolate Peanut Butter Mini Blender Muffins (gluten-free)

medium/large ripe banana, peeled

large egg

heaping 1/2 cup creamy peanut butter (I recommend using classic storebought peanut butter, and not natural or homemade because it can be oily or separate)

unsweetened natural cocoa powder

honey (agave, brown rice syrup, or maple syrup may be substituted)

vanilla extract

baking soda

salt, optional and to taste

heaping 1/2 cup mini semi-sweet chocolate chips + more for sprinkling muffin tops