Begin by preheating your oven to 350°F (175°C). This ensures that your muffins bake evenly and rise beautifully.
Grease your muffin tin with butter or line it with muffin liners to prevent sticking. This step is crucial for easy removal after baking.
In a large mixing bowl, whisk together the 2 cups of all-purpose flour, 6 tablespoons of granulated sugar, 0.5 teaspoon of salt, 1 tablespoon of baking powder, and 1 teaspoon of ground cinnamon until well combined.
In another bowl, beat the 2 large eggs and add in the 0.25 cup of melted butter and 1 cup of whole milk. Whisk until the mixture is smooth and well blended.
Pour the wet ingredients into the bowl with the dry ingredients. Gently fold them together using a spatula until just combined. Be careful not to overmix; a few lumps are perfectly fine.
Scoop the batter into each muffin cup, filling each about 2/3 full. This allows room for the muffins to rise without overflowing.
In a small bowl, mix together the 0.5 cup of granulated sugar and 1 tablespoon of ground cinnamon. Sprinkle this mixture generously over the muffin batter in each cup.
Place the muffin tin in the preheated oven and bake for 18-20 minutes, or until a toothpick inserted into the center comes out clean. The tops should be golden brown and fragrant.
Once baked, remove the muffins from the oven and allow them to cool in the tin for about 5 minutes. Then, transfer them to a wire rack to cool completely. Enjoy warm or at room temperature!