These decadent, make-ahead, no-bake Irish Chocolate Cheesecake Jars are perfect for parties, picnics, potlucks - take them anywhere, they're portable!
Place chocolate chips in a medium-size microwave-safe bowl. Microwave on high for 1 minute and stir. Return to microwave for another 30 seconds and stir until completely smooth. If there are still a few chocolate lumps, return to microwave for 10 seconds and stir again. The mixture should be really smooth. Set aside to cool while preparing the crust and whipped cream.
Place Oreos in the bowl of a food processor. Pulse until coarse crumbs form. Add melted butter and process again until well blended.
Place 16 4-ounce jelly jars or ramekins on a sheet pan. Divide crumb mixture equally, about 2 tablespoons in each jar. Reserve a small amount, if desired for garnish. With the bottom of a small flat bottom glass, gently tamp crumb mixture in the bottom each jar to create a smooth, even crust.
Place cream cheese and sugar in the bowl of a mixer. Beat on medium speed until smooth and fluffy, about 2 minutes. Add cooled chocolate and beat on medium-high speed for 3 minutes, stopping once or twice to scrape down sides of the bowl. Add Irish whiskey and beat a little longer till well incorporated.