Preheat oven to 375 degrees and lightly oil a mini muffin tin.
In a large bowl, whisk together flour, baking powder, and salt.
Pour melted coconut oil, honey, and milk into dry mixture and mix with a wooden spoon or spatula until just combined, taking care not to over-mix.
Gently fold in blueberries. Batter will be crumbly.
Spoon batter into prepared muffin tin, filling each cavity about ¾ of the way.
Bake for 15-18 minutes until muffins are turning golden and a toothpick inserted comes out clean.
Let muffins cool in pan for a couple minutes before removing from pan and placing on wire rack to cool completely.
When cooled, spread a little bit of blueberry frosting over the top of each muffin. Add sprinkles, if desired.