Blend the cottage cheese, Greek yogurt, maple syrup, and vanilla for the dip until silky. Refrigerate until serving.
Stir the granulated sugar and cinnamon for the coating together in a shallow bowl.
Blend the cottage cheese, eggs, milk, maple syrup, and vanilla for the pancakes until smooth.
Whisk the oat flour, vanilla protein powder, baking powder, cinnamon, and salt in a bowl. Stir in the blended mixture and rest the batter for 5 minutes.
Heat a nonstick skillet over medium-low heat and coat it with a thin portion of the avocado oil. Cook 1/4 cup portions of batter for 2 to 3 minutes on the first side and 1 to 2 minutes on the second side.
Lightly brush each warm pancake with melted butter and immediately sprinkle both sides with the cinnamon sugar.
Serve the churro pancakes warm with the chilled vanilla cottage cheese dip.