- Preheat oven to 350°F and grease donut pan 
- Combine 1 cup of Fruity Pebbles and buttermilk in large mixing bowl, set aside 
- Mix dry ingredients (flour, baking powder, baking soda) 
- Add lightly whisked egg, oil, vanilla, greek yogurt, and melted butter to bowl with cereal and buttermilk, stir until mixed 
- Slowly add flour mixture to buttermilk mixture until well combined 
- Fill prepared donut pan about ¾ full 
- Bake for 10 minutes or until bouncy on top 
- Let cool for 15-20 minutes in the pan 
- Mix together glaze ingredients, excluding cereal, until combined 
- Dip donuts in glaze and place on parchment paper 
- Sprinkle crushed cereal over glazed donuts in a diagonal direction 
- Serve and enjoy!