In a food processor, combine all the ingredients for the crust. Pulse until the pieces are smaller, but still have some texture. If the mixture doesn't stick together when pressed, add a bit more maple syrup.
Spray a muffin tin with non-stick spray. Press the granola mixture tightly into each muffin cavity to create a small indentation.
Spoon 1-2 teaspoons of yogurt into each granola cup.
In a microwave-safe bowl, melt the chocolate chips and coconut oil in 30-second intervals until smooth. Pour the melted chocolate over each granola cup.
Freeze the cups for 2-3 hours until the yogurt sets.
Carefully remove the cups from the muffin tin and sprinkle with flaky salt.
Store them in a bag or covered container in the freezer for up to 2 months. Enjoy your frozen granola cups whenever you need a cool and tasty treat!