Preheat the oven to 375°.

For frosting: In a medium bowl, beat together the frosting ingredients until mostly smooth (the chocolate chips will break down into smaller pieces).

Alternately, you can use a food processor if you have one to make a smoother spread.

Cover the bowl and refrigerate the frosting until ready to use.

For muffins: In a large bowl, mix together the flour, sugar, baking powder, cinnamon, and salt.

In a medium bowl, stir the milk and coffee granules until the coffee is dissolved.

Add the melted butter, egg, and vanilla and stir to mix well.

Stir the liquid mixture into the flour mixture just until moistened.

Use a rubber spatula and fold in the chocolate chips.

Grease muffin cups and fill about ⅔ full with batter.

(You may need two pans.

) Bake for 17 to 20 minutes or until done.

Cool for 5 minutes and then remove the muffins from the pan to a wire rack.

When the muffins are barely warm, spread the frosting on the tops.