Preheat oven to 375 degrees.
Grease a 12 cup muffin pan.
Stir together brown sugar, almonds, butter and cinnamon. Set aside. Whisk together flour, sugar, baking powder and salt. In separate bowl, whisk together egg, maple syrup, milk and butter; pour over dry ingredients. Evenly sprinkle with blueberries; stir just enough to moisten dry ingredients and distribute blueberries. Spoon into muffin cups, filling two-thirds full.
Sprinkle with streusel topping .
Bake for 20 to 25 minutes or until tops are firm to the touch. Let cool in pan on rack for 3 minutes.
Transfer to rack and let cool completely.
Adapted from Canadian Living Magazine.