2In a large bowl, combine flour, sugar, brown sugar, baking powder, coffee powder, salt and cinnamon
3In another bowl, mix together milk, melted butter, egg and vanilla
4Pour liquid ingredients into the dry mixture. Stir to combine but do not overmix. Use a maximum of 15 - 20 strokes, and don't worry about lumps in the batter. Stir in the chocolate chips or chopped chocolate.
5Spoon batter into 12 paper lined muffin cups
6Use a pastry cutter and combine the crumb topping ingredients in a small bowl
7Sprinkle topping evenly over the unbaked muffins
8Bake for 20 minutes or until a toothpick inserted in the center comes out clean
9These muffins are best served hot (warm at least!) I can't tell you if they keep well, they never last that long! A pot of fresh-brewed coffee + a bowl of fresh strawberries + these muffins = breakfast at my mom's house!!