01 - Place flour in one shallow bowl, beaten eggs in a second bowl, and combine panko breadcrumbs, regular breadcrumbs, garlic powder, smoked paprika, salt, and black pepper in a third bowl.
02 - Dredge each mozzarella cube in flour, then dip in beaten egg, and coat thoroughly in the breadcrumb mixture. For extra crunch, repeat the egg and breadcrumb coating a second time.
03 - Arrange breaded cubes on a parchment-lined tray and freeze for 15 minutes to firm up before frying.
04 - Pour about 2 inches of vegetable oil into a deep pot and heat to 350°F over medium-high heat.
05 - Fry mozzarella poppers in batches for 2 to 3 minutes, turning occasionally, until golden brown and crispy. Remove with a slotted spoon and drain on paper towels.
06 - In a small saucepan over medium heat, melt the butter. Stir in maple syrup, cayenne pepper if using, and a pinch of salt. Simmer for 2 to 3 minutes until slightly thickened.
07 - Arrange poppers on a serving plate and drizzle generously with the warm maple glaze just before serving.