Dark chocolate banana muffins

I am looking for the best banana chocolate muffins recipe, like the ones at Starbucks. They are huge and full of chocolate chips. Not too sweet, and I like to sink my teeth in them especially the top crust. One muffin is already enough to make you full, because it is huge.

This is not really the recipe I am looking for, but they taste good. Especially the day after.

Dark chocolate banana muffins

1 and a half cups all purpose flour
2/3 cup brown sugar
1 and a half tsp baking powder
1/4 tsp salt
2 big bananas, mashed
1 large egg
1/2 cup vegetable oil
1/4 cup milk
100g semi sweet dark chocolate, chopped

1. Preheat oven to 170 C.
2. In a large bowl, mix flour, sugar, baking powder and salt.
3. In a separate mixing bowl, combine the mashed bananas, egg, oil and milk until incorporated.
4. Stir the wet ingredients into the dry ingredients until just blended. Stir in the chopped dark chocolate.
5. Divide the batter into 12 muffin cups, filling until 3/4 full.
6. Bake the muffins for about 30 minutes, until the tops are pale golden and the cake tester comes out clean.
7. Let the muffins cool for 15 minutes.

Original recipe by Marcela Valladolid.