Banana & Oreo Muffin

Today i am making my girl's favourite yummy Oreo muffin for tomorrow breakfast.  I am using Ellena Guan's recipe (Thanks Ellena!) and made some modification.  I have reduce sugar by 10g.  Using fresh milk instead of condensed milk.

Ingredients: (make 6 medium-size muffins)
110g Butter, soften
90g   Sugar
110g Cake Flour
1/2 Teaspoon Baking Powder
1/2 Teaspoon Baking Soda
2 Egg
2 Tablespoons Fresh Milk
2 Medium Banana, mashed with fork
6 - 8 pieces of Oreo Cookies
1/2 Teaspoon Vanilla Essence
1/4 Teaspoon Banana Essence, optional

Method:
1. Sift the flour, baking power and baking soda together and set aside.
2. Remove the cream from the cookies, place the cookies in a ziplock bag, use a rolling pin, crashed the cookie into fine crumbs.
3. Cream butter and sugar with electric beater till light and fluffy(about 3 minutes on medium speed).
4. Add in egg one at a time and beat till the mixture is well combine without any egg trace.
5. Add mashed banana, vanilla essence and condensed milk into the butter mixture and give it a quick whisk.
6. Lower the mixer speed, add flour mixture and blend till the mixture become smooth.
7. Stir in the oreo cookies crumbs till combined, scoop the mixture into prepared muffin cups to 3/4 full.
8. Top the muffin batter with some extra banana slices and oreo cookies, bake then in preheated 180 degree oven for about 20 - 25 minutes or till a toothpick inserted in the center and comes out clean.