(Can use any 5 flavors of Jello.) For each layer: Dissolve Jello in 1 cup boiling water. Divide in half. Mix half with 1/2 cup yogurt. Mix well. Put in pan and chill. Mix second half of Jello with 3 tablespoons of cold water. Pour over first layer when layer in pan is set. Each layer takes 30 to 45 minutes to set. Use a 13 x 9 inch pan.