Into a medium bowl, measure in the whole milk, crack in the egg, and whisk to combine.
Melt the butter in the microwave for 20 seconds. Set aside.
Add the powdered buttermilk, drizzle in the vanilla extract and melted butter into the egg mix, and whisk until the mixture is smooth and creamy. That's it! Your batter is ready.
MAKING THE SAUSAGE PATTY
Cut the pork sausage in half and unwrap the first half. Cut it in two and use wet hands to beat it into flat sausage patties.
MAKING THE MCGRIDDLE
Take an empty jar lid(s) and cut out the base so that you get something like a cookie-cutter.
Place a frying pan on medium heat. Place the cookie cutter(s) (ahem, jar lid) right at the center and spray cooking oil on the frying pan.
Use a ladle spoon to pour some pancake batter into the cut-out jar lid(s). Drizzle some maple syrup on top while it cooks. Let the pancake cook for 3-5 minutes, then flip to the other side to cook for another 3-5 minutes (depending on the thickness of the pancake).
Add the sausage patties to the frying pan and let it sizzle and fry for 3-5 minutes on both sides. Place a slice of American cheese on each sausage patty and let it melt slightly for 3 minutes. Carefully take out the sausage patties with melted cheese and place them on a plate.
Place the jar lid(s) back on the frying pan and crack an egg to sit right at the center of the jar lid. Let it cook for 3-5 minutes before flipping to the other side.
Time to assemble the McGriddle. Place a pancake on a plate, layer with the sausage patty, add the egg atop and cover it up with another pancake. Drizzle maple syrup and serve while it's hot.