Gather together everything you will need to make the drink.
Stick the martini glass into the freezer so that it can chill.
Stick some ice into she shaker so that it is filled up.
Take the jigger and measure 1.5 oz of peanut butter whiskey. Toss that into the shaker.
Take the jigger and measure .5 oz of vodka. Toss that into the shaker.
Take the jigger and measure 1 oz of irish cream. Toss that into the shaker.
Stick the lid for the shaker on and shake well. After around 15 seconds or so the shaker will get cold.
Take the chilled glass out of the freezer.
Take off the shaker lid and put on the strainer.
Pour the martini into the chilled glass.