Bake your favorite cupcake mix and cool completely. Be sure to only fill the cupcake liner or pan ¾ full. Trim the top of the cupcake if needed. If you over fill the pan the cupcake top will be too large and will not fit into the opening of the mason jar.
Make the strawberry sauce and cool completly.
Slice each cupcake in half.
Place the bottom half of the cupcake into the bottom of the mason jar, cut side facing up.
Spoon about 1 tablespoon of the strawbery sauce over the top half of the cupcake in the jar. Add a scoop of TCBY frozen yogurt on top of the strawberry sauce. Top with the top half of the cupcake, trimmed if needed and the cut portion facing up. The strawberry sauce will soak into the cupcake this way.
Add another tablespoon of strawberry sauce on top of the cupcake top.
Top with some whipped topping and garnish with a strawberry.
You can make these ahead and freeze. Wait until serving to add the whipped topping and strawberry garnish.
Remove from the freezer 15 minutes before serving.