Preheat the pan. Heat a large skillet or nonstick pan over medium heat.
Mix the wet ingredients. In a medium bowl, beat the egg until smooth. Add the whole milk and vanilla extract and whisk until fully combined.
Add the dry ingredients. Stir in the flour, baking powder, and granulated sugar. Mix until just combined.
Incorporate the remaining ingredients. Pour in the melted butter and add the Greek yogurt. Gently fold everything together until incorporated. Do not overmix, a few small lumps are perfectly fine.
Cook and fill. Lightly butter the heated pan. Pour about ¼ cup of batter onto the pan. Add a spoonful of Las Sevillanas milk caramel to the center, keeping it away from the edges. Carefully spoon a little more batter over the caramel to fully cover it.
Flip carefully. Cook until bubbles form on the surface and the edges look set (about 2–3 minutes). Flip gently and cook another 2–3 minutes until golden brown and cooked through.
Finish and serve. Drizzle with Las Sevillanas milk candy, dust with powdered sugar, and top with fresh blueberries. Serve warm for the ultimate gooey caramel experience.
Pro Tip: Keep the heat at medium-low if your pancakes brown too quickly. This ensures the caramel center melts perfectly without burning the outside.