Place your shot glass in the freezer for at least 2 minutes before you start mixing. A cold glass keeps the layers distinct and prevents them from mixing together too quickly.

Pour 0.5 ounces of Irish whiskey into the chilled shot glass as your base layer. This is the foundation of your drink, so measure it carefully to leave room for the remaining ingredients.

Pour 0.5 ounces of dark rum slowly over the back of a bar spoon held just above the whiskey layer. The spoon slows the pour and prevents the rum from sinking directly into the whiskey below, keeping your layers visible.

Using the same bar spoon technique, carefully pour 0.25 ounces of peach schnapps over the rum layer. Watch as the lighter color schnapps sits on top, creating the second distinct layer in your glass.

Slowly pour 0.25 ounces of Irish cream liqueur over the back of your bar spoon onto the peach schnapps layer. This creamy layer will be your final spirit layer, and it's the most delicate to layer because of its density.

Top off your layered shot with just a splash of ginger ale or lemon-lime soda, pouring it gently over the back of the spoon. This adds a refreshing fizz and completes the visual appeal of your drink.

Step back and admire your work. You should see distinct color bands in your glass, from dark at the bottom to lighter shades as you move up.

You can either shoot it all at once for the full flavor experience, or sip it slowly to taste how the flavors change as the layers blend together. Most people choose to shoot it in one go for maximum impact and the smooth finish that makes this drink so popular.