These lemonade Jello shots are a fun and boozy party treat ... Whisk together 2 cups of lemonade and 3 envelopes of Knox gelatin in a small saucepan. Step 2: Heat over medium heat until the ...

Cooke entered a recipe contest sponsored by Knox Gelatine in 1905 ... in a mold—not too different from what Jell-O makers do today. After processing gelatin, manufacturers slice up the substance ...