- Grease 13x9 pan. 
- Combine all ingredients in a pan. Bring to a boil over medium heat, stirring constantly. Boil for a minute. 
- Pour into a prepared pan and refrigerate until set. 
- Dust cutting board with sugar. Use a spatula to loosen sides and turn out onto the cutting board. 
- Dust top of Jello with sugar. 
- Use a shamrock-shaped cookie cutter to cut out gumdrops. 
- Roll edges in extra sugar and set onto wax paper for 1 hour to dry out slightly. 
- Store in an airtight container.