Preheat the oven to 190 ̊C/170 ̊C fan/gas mark 5. Line a 12 hole muffing tray with muffin cases.
In a bowl, add the banana and mash. Add the peanut butter, eggs, vanilla and honey. Stir until combined.
Add the flour, oats and baking powder. Stir until combined.
Gradually add the water and stir until combined.
Divide the mixture between the muffin cases and bake for 15-20 minutes or until golden. Allow to cool fully. Once cooled, remove the muffin cases.
Spread a teaspoon of cream cheese or natural yogurt onto each pupcake and decorate with their favorite dog treat.