Preheat the oven to 350°. Butter three 8" x 4" loaf pans.
Combine the milk, instant coffee, and dates in the blender. Blend on high until smooth, about 2-3 minutes.
Cream the butter with the milk, coffee, and dates mixture in a stand mixer with the paddle attachment on medium speed until soft and fluffy, about 1-2 minutes.
Whisk together the flour, salt, and baking soda in a separate bowl.
Add the eggs one at a time to the creamed butter mixture with the mixer on low. Add the vanilla and bananas, continuing to mix until well-blended.
Add the flour into the wet mixture and mix until just combined. Fold in the chocolate chips. Divide the mixture between the two buttered loaf pans and bake for 55-60 minutes, or until a toothpick inserted into the loaf comes out clean.