Cinnamon Struessel Muffins

Preheat oven 350, line muffin tin w/liners or use non-stick spray. In large bowl, 1cup all-purp flour, 1tsp baking powder & ¼cup of ea: granulated sugar, cinnamon & salt. In small bowl, whisk ½cup milk, 1 slightly beaten egg & 3tbsp melted butter, blend well. Mix wet ingredients w/dry ingredients only til moistened-Do not overmix. Pour into muffin cups & bake 18mins. Topping: Combine ¼cup all-purp flour, 2tbsp brown sugar, ¾tsp cinnamon & cut in 2tbsp soft butter til mix is crumbly & sprinkle on