Prep the pan and oven: Heat your oven to 350°F (175°C). Line a 12-cup muffin tin with paper liners or lightly grease it.
Blend the wet ingredients: In a blender, add cottage cheese, eggs, maple syrup, oil, and vanilla. Blend until completely smooth and creamy, about 20–30 seconds.
This step removes curds and keeps the crumb tender.
Mix the dry ingredients: In a large bowl, whisk oats, flour, protein powder, baking powder, baking soda, and salt until evenly combined.
Combine wet and dry: Pour the blended mixture over the dry ingredients. Stir gently with a spatula until just combined. If the batter looks very thick, add milk 1 tablespoon at a time until it’s scoopable but not runny.
Fold in chocolate chips: Stir in the chocolate chips, reserving a small handful for the tops if you like a bakery-style look.
Fill the muffin cups: Divide the batter evenly among the 12 cups (they should be about 3/4 full).
Sprinkle a few extra chips on top for presentation.
Bake: Place the pan on the center rack and bake for 16–20 minutes, or until the tops are set and a toothpick comes out with a few moist crumbs.
Cool: Let muffins rest in the pan for 5 minutes, then transfer to a wire rack to cool completely. This helps them set and stay fluffy.