Preheat oven to 400°F. Line 12 standard-size muffin cups with paper liners. Combine milk, cottage cheese, and eggs in large bowl. Use electric mixer to blend on medium speed for 1 to 2 minutes. Stir in Cheddar cheese. Stir in corn muffin mix until just blended. Do not over mix. Spoon batter into prepared muffin cups, dividing equally. Bake about 13 to 15 minutes, or until light brown on top and toothpick comes out clean. Let muffins cool to room temperature.