1. Fill a tumbler 3/4 of the way with ice cubes. Not crushed, cubed.
2. Add some Jameson until about half full.
There are other options for this step, but this is my preference. If you’re feeling thrifty, go for some Seagrams 7. If you want to step it up because your money is burning a hole in your pocket but don’t really care if there is a noticeable upgrade despite the extra cost, you might consider springing for some Bushmills. Regardless, Step 2 remains the same.
3. Mix it up. Drink it.