banana-espresso crumb cake
from vanillasugarblog 
inspiration from cookbook Baked

1 and ½ cups mashed, very ripe bananas (about 4)
¼ cup firmly packed light brown sugar
½ cup (1 stick) unsalted butter, melted
¼ cup half & half
1 large egg
1 and ½ cups all-purpose flour
1 and ½ packets of Starbucks Via
1 and ½ ts baking soda
1 ts sea salt
¾ cup bittersweet chocolate chips (I swear by Ghiradelli)

Preheat the oven to 350 degrees F.
Spray a 8 ½ x 8 ½ pan (or a 9 x 9) with nonstick cooking spray. In a medium bowl, stir together the bananas, sugars, butter, half & half, and egg.

In another medium bowl, whisk together the flour, instant espresso powder, baking soda and salt.
Make a well in the middle of the dry ingredients.

Pour the wet ingredients into the well and stir just until combined. Fold in the chocolate chips.
Pour mixture into pan, then top with crumbs (see below).

Bake in the center of the oven for 35 - 45 minutes, depending on your oven. Watch them at the 35 minute mark; turn pan around midway through baking. Will be done when a toothpick inserted in the center of cake comes out clean.
Let cool for 15-20 minutes before slicing in. If it’s hard to cut them, just stick it in the fridge to harden up.

crumb topping
1 and ½ cups flour
1 cup packed light brown sugar
1 ½ ts coarse salt
1 ts ground cinnamon
1 sticks unsalted butter, melted & cooled
Confectioners' sugar for dusting, optional