Set your oven to 375°F (190°C) and line a 12-cup muffin tin with liners or lightly grease each cavity.
In a blender, combine the milk, cottage cheese, eggs, olive oil, honey, and vanilla extract. The mixture should be blended until it becomes smooth and creamy. This step ensures the cottage cheese breaks down into the batter for a uniform texture.
In a large bowl, whisk together the flour, cinnamon, salt, and baking powder. This forms the base of your muffin batter.
Gradually pour the blended wet ingredients into the bowl with the dry ingredients. Use a whisk or spatula to mix gently until just combined. The batter should be thick but smooth.
Toss the blueberries with a teaspoon of flour, then gently fold them into the batter using a spatula. Be careful not to overmix — a few streaks of flour are okay.
The batter should be evenly distributed among the 12 muffin cups. A ¼ cup scoop works perfectly for consistent portioning. If there’s any extra batter, top off the muffins evenly.
Bake in the preheated oven for 18–22 minutes, or until the tops are golden and a toothpick inserted in the center of a muffin comes out clean.
Let the muffins cool in the tin for about 5 minutes before transferring them to a wire rack. Serve warm or at room temperature.