Prep the ingredients per the instructions above.
Preheat the oven to 375°F (190°C). Line a muffin tin with 4 liners or grease lightly.
Mix dry ingredients: In a bowl, whisk together flour, sugar, baking powder, baking soda, salt, and cinnamon.
Combine wet ingredients: In another bowl, whisk pumpkin purée, milk, melted butter, and egg until smooth.
Make the batter: Add dry ingredients to wet ingredients and stir gently until just combined.
Fold in blueberries carefully.
Fill the muffin tin evenly with batter.
Bake for 18–20 minutes, until a toothpick inserted comes out clean.
Cool muffins in the pan for 5 minutes, then transfer to a rack.
Serve pumpkin blueberry muffins with fresh fruit and milk.