Place the Flour, Brown Sugar and Ground Cinnamon in a large bowl
Cut the cold butter into small cubes and add them to the dry ingredients. Rub the butter into the flour to create small crumbs. All the dry ingredients should be coated in butter, and the streusel should look like wet sand. Set aside.
Apple Cinnamon Muffins
Preheat your oven on 180'C/350'F and grease a Muffin tin (see note 2).
Peal, core and dice the Apples into very small pieces. Set Aside.
Melt the butter and set aside to cool down.
In a large bowl, whisk the Brown Sugar and Eggs until foamy. Add the melted Butter, then the Applesauce and the Milk. Whisk until combined.
Sift in the Dry Ingredients: Plain Flour, Baking Powder, Ground Cinnamon and Salt. When combined, fold in the Apple dices with a spatula.
Putting the Muffins together
Pour the Muffin batter into each Muffin Pan. Cover each muffin with some Streusel Topping. Gently press the streusel into the muffin batter.
Bake the muffins for 25 to 30 minutes, or until the tip of a knife comes out clean. Leave to cool down completely before removing from the pan.
You can make the Streusel Topping either by hands or directly in your food processor. Try not to get crumbs that are too small as you want to create some crunch over your muffins!
Make sure the tins are properly greased if not using liners. Without a liner, make sure to let the muffins cool down completely before removing them from the tin as they will be a bit fragile when warm.