01 -
Place 16 Oreo cookies into a ziplock bag. Crush the cookies into cookie crumbs. The crumbs don't have to be fine, but should be little crumbs to make them easier to scoop with a spoon. Set aside for now.
02 -
Add the chopped chocolate or chocolate chips and ½ cup (120 ml) heavy cream to a microwave safe bowl. Heat the bowl in 30 second increments, stirring the chocolate and heavy cream in between until the chocolate has fully melted into the heavy cream. This should look smooth and glossy, like chocolate ganache. Melting the chocolate into the heavy cream can take about 1 - 2 minutes, but should be done in 30 second increments.
03 -
Add the remaining 2 cups (240 ml) heavy cream, powdered sugar and vanilla extract to a mixing bowl fitted with a whisk attachment. Combine the ingredients on low for 1 minute. Increase the speed of the mixer to medium speed. Mix for about 4 - 5 more minutes or until the cream has whipped to medium stiff peaks. Scoop out ½ of the whipped cream and set aside. This is the whipped cream layer.
04 -
With the mixer on low, add in the cooled chocolate ganache and cocoa powder until all the ingredients have been added. Mix on low until the mixture is glossy and fully combined. This is the chocolate mousse layer.
05 -
To assemble the chocolate parfait dessert, grab (4) 6 oz. glasses or (6) 4 oz. glasses. Add 1 tablespoon crushed oreo cookies to the bottom of the cups. On top of the oreos add 1 - 2 tablespoons chocolate mousse, followed by 1 - 2 tablespoons whipped cream. Repeat 1 - 2 more times, ending with Oreos as the top and final layer.
06 -
Transfer the dessert parfait cups to the fridge to set for 3 - 4 hours and up to overnight. Loosely cover the top of each of the cups with plastic wrap, especially if the parfaits are going to set overnight.