- In a medium bowl, whisk together the flour, baking powder, and salt. Whisk in the milk, egg, vanilla extract, and oil, until incorporated. 
- Heat skillet over medium heat, and spray it with nonstick spray. 
- Using a ⅛-¼ size measuring cup, pour batter onto skillet. Spread the batter out more if necessary, to about 4-inch diameters. 
- Reduce the heat to medium-low. 
- When your pancake begins to form bubbles around the edges, pipe the filling. Starting at the center of the pancake, squeeze the filling on top of the pancake batter in a swirl, just as you see in a regular cinnamon roll. 
- Cook the pancake 2 to 3 minutes, or until the bubbles begin popping on top of the pancake and it's golden brown on the bottom. 
- Gently but quickly flip over pancake. Cook an additional 2 to 3 minutes (with temperature still on medium low), until the other side is golden as well. 
- Wipe out the pan with a paper towel, and repeat with the remaining pancake batter and cinnamon filling. 
- Serve pancakes topped with a drizzle of glaze.