Preheat oven to 350º F and generously grease a standard bundt pan with butter or non-stick spray.
In a medium bowl, whisk together cheddar and parmesan cheeses, parsley, sesame seeds, poppy seeds, onion flakes, garlic flakes, salt and pepper.
Stir in melted butter until everything is fully incorporated.
Place biscuit dough in a large bowl and transfer to a large, resealable plastic bag.
Pour butter and seasoning mixture into plastic bag, then press out excess air and seal bag carefully.
Shake bag for 30-50 seconds, or until all biscuit pieces are covered in seasoning, then transfer mixture to greased bundt pan.
Cover pan with aluminum foil and place on a baking sheet to prevent spillage. Place in oven and bake for 40-45 minutes, or until golden brown and cooked through.
Remove from oven and let cool 10 minutes, then run a knife around the edge of the pan to loosen the edges.
Invert monkey bread onto serving platter and serve hot!
Optional: microwave in 20-second increments until pourable and drizzle over monkey bread to serve.
