Apple muffin with streusel topping

Having been searching the web recently for my craving. My DH bought some muffin home, after trying i felt in love with it. But can't seem to find any similar recipes. I remember the strong aroma of cinnamon streusel topping, the ingredients inside the muffin was an ??? So with no choice, i can only opt for something similar with the cinnamon topping. Then i saw this on Diana's recipes with the ingredient topping i want and immediately, i started to bake. My DH can't remember where he bought the muffin from till now. Well the topping was very delicious and it was gone the next day.

Makes 10 pieces
Ingredients:
Streusel Topping
1/4 cup plain flour
1/4 cup brown sugar
1/4 tsp ground cinnamon
28g cold butter

Muffins
1 cup + 2 tbsp plain flour
1/2 cup fine sugar
2 tsp baking powder
1/4 tsp salt
1 large egg
1/2 cup milk
71g unsalted butter (melted)
1 large apple (remove skin, encore and cut into small cube)

Methods:

• Preheat oven at 200C.

For Topping:

1. In a medium bowl, mix sifted flour, brown sugar and cinnamon powder.
2. Rub in the cold butter and set aside.

For Muffins: -

1. Sift flour, add in sugar, baking powder, salt and set aside.
2. In another bowl beat egg, add milk and melted butter mix well.
3. Fold in the chopped apple and fill batter 80% full in the muffin cup.
4. Sprinkle 1 tbsp of streusel topping.
5. Bake in a preheated oven for 20-25 mins. Leave the muffin in the tray for 5 mins and remove to cool on the wire tray.

Adapted from: http://www.dianasdesserts.com/index.cfm/fuseaction/recipes.recipeListing/filter/dianas/recipeID/1187/Recipe.cfm