Grilled Cheese Pancakes

Name: Grilled Cheese Pancakes
Prep time: 15 min
Total time: 15 min
Cuisine: American
Ingredients: 200 g plain flour; 2 tsp. baking powder; 1 tsp. salt; 1 tbsp. caster sugar; 240 mL plus 2 tbsp. milk; 60 g sour cream; 1 large egg; 3 tbsp. melted butter, plus more for pan; 100 g grated cheddar; 100 g grated mozzarella; 25 g freshly grated Parmesan; Coarsely ground black pepper; 2 tbsp. mayonnaise; Maple syrup, for serving; Crumbled bacon, for garnish