Use cupcake liners for easy cleanup and storage.
Line muffin tin with cupcake liners or set up cupcake liners on a cookie sheet.
Layer each cupcake liner with granola.
Add Greek yogurt on top of granola. Fill each cupcake liner to the top with the yogurt.
Top off each yogurt cup with berries and put in the freezer for at least 2 hours. Store in an airtight container in the freezer up to 2 weeks.