Mini Key Lime Pies with Cinnamon Toast Crunch Crust

Name: Mini Key Lime Pies with Cinnamon Toast Crunch Crust
Ingredients: 2 1/2 cups Cinnamon Toast Crunch cereal; 4 tablespoons unsalted butter, melted; 1 tablespoon packed dark brown sugar; 3 cups sweetened condensed milk (from three 14-ounce cans); 1/2 cup sour cream; 1 1/2 teaspoons grated Key lime zest*; 1/2 cup freshly squeezed Key lime juice*; 1/2 cup heavy whipping cream; 1 1/2 teaspoons confectioners? sugar; 1/4 teaspoon pure vanilla extract; 1 teaspoon grated Key lime zest*, plus more for topping; *Note: Regular limes work fine. #NotBougie