We finally succeeded in freezing a bubble into ice. Temperature outside was -24. The trick was getting the correct recipe for making a bubble in the cold weather: 3 cups water, 1 cup dish soap, 1/2 cup corn syrup (keeps bubble together in the cold). I cut the recipe into 1/3.
We also did over the boiling water trick as the sky was nice a blue so it is now easier to see the results.
With Nikon D3200