Dr. Oetker Mousse Instant Mousse Mix Milk Chocolate.4 Servings. Prep time: 5 minutes. You will need: Cold milk 1 cup. Preparation directions:1. Pour it in! Pour milk into bowl. Add contents of package.2. Beat! Beat with electric mixer on low speed until thickened. Whip at highest speed for 3-5 min.3. Spoon & enjoy! Spoon into dessert dishes.