Cook bacon until perfectly crisp. Drain on paper towels and set aside.

Carefully slice each glazed donut horizontally into two halves.

Assemble the sandwich: layer cheese, crispy bacon, and a small drizzle of maple syrup (about 1/2 tsp) between the donut halves. Place a slice of cheese on top of the bacon before adding the second donut half.

Optional: Spread a thin layer of butter on the outer glazed side of each donut half.

Heat a skillet or griddle over medium-low heat. Place the donut sandwich in the skillet and grill for 2-4 minutes per side, until golden, caramelized, and cheese is completely melted and gooey. Press gently with a spatula.

Optional Maple Drizzle: For extra sauce, combine 1/4 cup maple syrup and 1 tsp butter in a small bowl. Heat until butter melts and mixes with syrup, creating a thick, heavy, gooey viscous consistency. Add a pinch of cinnamon if desired.

Remove from skillet, place on a serving plate, and immediately drizzle generously with warm maple syrup (either the optional drizzle or straight from the bottle). The gooey maple syrup should display a thick, heavy, viscous consistency. Serve immediately while warm.