Preheat oven to 350 degrees. Line a 12-cup muffin pan with paper liners or you can use a silicone muffin pan and spray lightly with non-stick cooking spray.
Melt 6 tablespoons of butter and set aside.
Using a blender or food processor, blend the cottage cheese until it’s smooth and creamy; set aside.
In a large mixing bowl, whisk together the flour, baking powder, baking soda and salt and set aside.
In another large mixing bowl, using a mixer, beat the melted butter and sugar together for 5 minutes until the mixture is light and fluffy.
Add the eggs one at a time to the butter/sugar mixture mixing well with each addition Add the vanilla extract and the smooth cottage cheese and continue mixing until just combined, without overmixing.
Combine the dry ingredients in with the wet ingredients and use a rubber spatula to mix just until the dry ingredients are combined. Batter will be thick.
Add the blueberries and fold in the batter.
Using a large cookie scoop, scoop the muffin batter into each of the muffin tins, you can make 13-14 muffins, so you may have some left over.
Bake muffins for 20-25 minutes or until a toothpick insured in the middle comes out clean.
Remove muffin pan from oven and let the muffins cool completely in the muffin pan. Enjoy!