1-First Step: Prepare your ingredients and tools Set out a saucepan, a fine mesh sieve, two mixing bowls, a hand mixer or stand mixer, a spatula, and 6 to 8 small dessert glasses. Measure all ingredients before you start so the gelatin does not sit too long after blooming. If you are using frozen cranberries, keep them frozen until you are ready to cook.

2-Second Step: Cook the cranberry mixture In a saucepan over medium heat, combine 1 1/2 cups cranberries, 1/2 cup granulated sugar, 2 tablespoons water, 1 teaspoon orange zest, and 1 tablespoon orange juice. Simmer for about 10 minutes, stirring now and then, until the berries burst and the mixture thickens. The fruit should look glossy and soft, with most of the cranberries broken down. If you want more holiday color, a small amount of pink or red gel food coloring can go in later. Keep it light, because the berries already give the dessert a natural blush.

3-Third Step: Strain and finish the cranberry base Pour the cooked mixture through a fine mesh sieve into a bowl, pressing the solids to get as much puree as possible. This step removes skins and gives the cranberry mousse cups a smoother texture. Stir in 1 teaspoon vanilla extract after straining. While the puree is still warm, bloom 1 teaspoon unflavored gelatin in 2 tablespoons cold water for 5 minutes. Once it softens, dissolve it over low heat, then stir it into the cooled cranberry puree. Let the mixture cool enough that it will not melt the whipped cream when folded in.

4-Fourth Step: Whip the cranberry mousse Whip 3/4 cup cold heavy cream to soft peaks. Soft peaks mean the cream will hold a shape, but the tip gently folds over when the whisk is lifted. Fold the cooled cranberry mixture into the whipped cream until the color looks even. If you want a deeper pink tone, add a few drops of gel coloring now. Do not overmix. Gentle folding keeps the mousse light instead of dense.

5-Fifth Step: Make the vanilla mousse layer For the vanilla mousse, bloom 1 teaspoon unflavored gelatin in 2 tablespoons cold water for 5 minutes, then dissolve it over low heat. In a clean bowl, whip 1 cup cold heavy cream with 1/4 cup powdered sugar and 1 teaspoon vanilla bean paste or extract to soft peaks. Fold in the dissolved gelatin slowly so the mixture stays airy and smooth. This vanilla layer gives the dessert a creamy base that balances the tart cranberry topping. If you like a stronger vanilla flavor, use vanilla bean paste instead of extract.

6-Sixth Step: Assemble the cups Spoon the vanilla mousse into the bottom of 6 to 8 small dessert glasses. Add the cranberry mousse on top, dividing it evenly so each cup looks balanced. For the cleanest layers, chill the vanilla layer briefly before topping it with cranberry mousse. This helps keep the colors from blending too much. Use the back of a spoon to smooth the tops if needed. The dessert looks especially nice in clear glasses because you can see the layers.

7-Seventh Step: Chill until set Place the assembled cups in the refrigerator for at least 2 hours. This chilling time lets the gelatin firm up and gives the mousse a light, spoonable texture. If you are making them ahead for a party, they can sit a little longer in the fridge before serving.

8-Eighth Step: Garnish and serve Right before serving, top each cup with sugared cranberries and fresh mint leaves if you like a festive finish. Serve the dessert cold for the best texture and flavor. The chilled mousse tastes refreshing, creamy, and bright all at once.