Combine Dry Ingredients. Preheat your oven to 375°F. In a medium bowl, whisk together 1½ cups all-purpose flour, 2 teaspoons baking powder, and ½ teaspoon salt.
Whisk the Wet Mixture. In a separate bowl, stir 1 cup cottage cheese with 2 eggs, ½ cup milk or buttermilk, and 3 tablespoons melted butter or oil. Add ¼ cup sugar (or sweetener) if you’re making sweet muffins. Adjust to taste.
Combine & Mix. Gently pour the wet mixture into the dry ingredients. Stir just until combined – overmixing can lead to dense muffins. If you want add-ins like berries or chopped herbs, fold them in now.
Fill & Bake. Line a 12-cup muffin tin with paper liners or lightly grease each cup. Divide the batter evenly among the cups, filling them about ¾ full. Bake for 15–18 minutes, or until a toothpick inserted into the center comes out clean. Let the muffins cool in the tin for about 5 minutes, then transfer to a wire rack.