Preheat oven to 400 degrees, line muffin pan with paper liners
Whisk together flour, sale, and baking powder in a large bowl
Whisk liquified and cooled coconut oil, egg, milk, maple syrup, 2 tbsp lemon juice, and lemon zest from half of the lemon in a separate bowl. If coconut oil solidifies place bowl over a warm pot of water to liquify
Stir liquid ingredients in dry ingredients unit just combined. Be careful not to over mix. Fold in blueberries
Spoon batter into prepared muffin liners, filling them 2/3 full, add streusel topping evenly amount the top of muffins
Bake muffins for 16-18 mins in preheated oven until they rise and the tops are golden brown. Inserting a toothpick into the center of muffin should come out clean.