Combine the sugar, butter, and water in a large, heavy saucepan over medium heat. Stir to dissolve the sugar. Continue to stir for 3 to 4 minutes. The mixture will begin to boil. Add the pecans and continue to stir for about 5 minutes.
Remove from the heat and drop by the spoonful onto waxed paper. Cool completely. Remove from the paper with a thin knife. The pralines can be stored in an airtight container at room temperature for about 2 weeks.
Yield: about 2 dozen