In a large bowl, combine flour, sugar, baking powder, cinnamon, and salt.
In a medium bowl, whisk together milk, instant coffee, butter, egg, and vanilla.
Add the wet ingredients to the dry ingredients, and stir until just combined.
Fold in chocolate chips.
Line regular-sized muffin cups with paper liners. Fill 2/3-full.
Bake at 375 degrees for 15-20 minutes, or until a toothpick inserted near the center comes out clean.
Remove to a wire rack to cool.