Disclaimer: haven't tried with pot brewed coffee (only Donut Shop Original Kcup) nor have I tried any flavors beside vanilla extract, or sweeteners other than sugar.
Step 1: Collect Supplies!
1 can Evaporated Milk( Not sweet. cond.)
Coffee ( A warm brewed pot or Keurig 8oz)
Flavoring (Vanilla extract, Mint Extract, etc)
A plain coffee mug
A DIFFERENT serving glass (not mug)
Sm. measuring spoons
A few spoons
Step 2: Make the Drink!
( this is good and sweet)
Step 2: cover sugar with evaporated milk and stir well
Step 3: add 1/2 tsp vanilla extract or flavoring
Step 4: Add 8oz Coffee of choice, stir well
Step 5: add Ice to serving glass
Step 6: Pour drink over ice ( in this glass I go to about 3/4)
Step 7: fill with more evaporated milk (it should layer on ice) and spin glass slowly to spin levels