-
Preheat oven to 350F. Spray a doughnut pan with baking spray.
-
Beat peanut butter, vegetable oil, banana, honey, and egg until combined.
-
In a separate bowl, whisk together flour, baking soda, and baking powder. Slowly add the dry mixture to the wet ingredients and beat until just combined.
-
Transfer the mixture to a ziploc bag, snip off a corner, and pipe the mixture into the doughnut pan. They should be about ¾ full.
-
Bake 8 - 10 minutes or until browned and a toothpick inserted into doughnuts comes out clean. Invert onto a wire rack to cool completly.
-
Repeat with remaining batter.
-
To make the frosting, stir together the Greek yogurt and honey. Spread the frosting onto cooled doughnuts and sprinkle the smashed dog treats on top.