Prepare Cinnamon Filling: In a small bowl, combine melted butter, brown sugar, and ground cinnamon until well blended. Transfer to a ziplock bag, seal tightly, and allow the filling to thicken at room temperature for about 10–15 minutes.

Make Pancake Batter: In a mixing bowl, whisk together flour, baking powder, and salt. Mix in milk, vegetable oil, and beaten egg until just combined, allowing some lumps.

Make Cream Cheese Glaze: In a microwave-safe bowl, combine cream cheese and melted butter. Heat for 20-30 seconds, whisk until smooth, then stir in powdered sugar and vanilla extract.

Cook Pancakes: Preheat a non-stick skillet on low heat. Pour ½ cup of batter onto the skillet, pipe a swirl of cinnamon filling on top, cook until bubbles form, then flip.

Serve: Stack pancakes, drizzling generously with cream cheese glaze. Sprinkle with powdered sugar or nuts if desired, and serve warm.