This great dessert is a super easy treat. Begin by chilling your stand mixer bowl. Add one cup of very cold heavy cream and a tablespoon of powdered sugar.
Whip on high until firm peaks are formed. Add a teaspoon of vanilla extract. Transfer mixture to a bowl.
Without cleaning bowl, add one can sweetened condensed milk and one half cup of key lime juice. Mix on high for several minutes until slightly foamy. Slowly add whipped cream into the mixture until well blended.
Prepare the parfait glasses by adding a half crushed Graham cracker to the bottom of the glass. Carefully spoon the mousse into the glasses, filling almost to the top. Chilled for several hours. Before serving, top with whipped cream.
Enjoy this great treat poolside on a hot summer day.