1 cup Rum or Bourbon
2-4 tbsps of simple syrup
2 cups of watermelon, strawberries, peaches, etc.
Juice of 1-2 limes
Blend above ingredients thoroughly in blender, then add 2-4 cups of ice and blend again until smooth.
This is a very versatile recipe with many interchangeable ingredients. It is also made to taste so that is why the amounts are so varied.