Brigadeiro Cupcakes

Name: Brigadeiro Cupcakes
Cuisine: American
Ingredients: 1 (15.25 oz or 432g) Betty Crocker milk chocolate super moist cake mix; 1-1/4 cups water (I used coconut milk for a moister batter); 1/3 cup vegetable oil; 3 large eggs, at room temperature; 1 (14 oz or 396 g) can of sweetened condensed milk; 1/4 cup baking cocoa powder; 2 tablespoons unsalted butter (softened); 1 tablespoon pure vanilla extract; 1-2 tablespoons heavy whipping cream