Strawberry Streusel Muffins
["1 1/2 c. flour", "1/4 c. sugar", "1/3 c. brown sugar, packed", "2 Tbsp. baking powder", "1/4 tsp. salt", "1 tsp. cinnamon", "1 egg, slightly beaten", "8 Tbsp. unsalted butter, melted", "1/2 c. milk", "1 1/4 c. strawberries, chopped", "1 tsp. lemon zest, grated"]
["Preheat oven to 350\u00b0.", "Line muffin cups with paper liners. Sift together flour, sugar, brown sugar, baking powder, salt and cinnamon into medium bowl.", "Make a well in the center.", "Put the egg, melted butter and milk in the well.", "Stir until combined. Quickly stir in strawberries and lemon zest.", "Fill each cup 3/4 full with batter."]
["flour", "sugar", "brown sugar", "baking powder", "salt", "cinnamon", "egg", "unsalted butter", "milk", "strawberries", "lemon zest"]