Preheat Oven: Preheat your oven to 350°F (175°C).
Prepare Ramekin: Lightly grease a single-serve ramekin with non-stick spray or butter.
Mix Dry Ingredients: In a small bowl, mix the rolled oats, protein powder, baking powder, cinnamon (if using), and salt.
Mix Wet Ingredients: In another bowl, whisk together the milk, maple syrup, and vanilla extract until smooth.
Combine Wet and Dry Ingredients: Pour the wet ingredients into the dry ingredients and stir until fully combined. Gently fold in the sprinkles.
Pour Into Ramekin: Spoon the batter into the prepared ramekin and spread it out evenly. Top with a few extra sprinkles for decoration.
Bake: Bake in the preheated oven for 15 minutes, or until the top is set and slightly golden.
Cool and Enjoy: Let it cool for a few minutes before serving. This funfetti-inspired ramekin treat is perfect for a festive breakfast or snack!