Delicious Pineapple Muffins

Preheat the oven to 375 degrees F (190 degrees C). Grease and flour 16 muffin cups or line with paper liners.

Stir together 2 cups flour, white sugar, baking powder, and salt in a large bowl; form a well in the center. Drain pineapple, reserving 1/4 cup juice; add juice to the well. Pour in milk, 1/4 cup melted butter, and beaten egg; mix just until blended. Portion batter into the prepared muffin cups. Spoon crushed pineapple over batter.

Stir together remaining 1/2 cup flour, brown sugar, remaining 1/4 cup melted butter, and cinnamon in a small bowl until well combined; sprinkle over crushed pineapple.

Bake in the preheated oven until a toothpick inserted into the center of a muffin comes out clean, about 30 minutes.