Bill s Famous Pina Colada

1 fluid ounce light rum

1 fluid ounce amber rum

3 fluid ounces pineapple juice

2 fluid ounces sweet and sour mix

2 fluid ounces cream of coconut (such as Coco Lopez®)

1 fluid ounce half-and-half cream

ice cubes, as needed

¼ fluid ounce dark rum

Pour the light rum, amber rum, pineapple juice, sweet and sour mix, cream of coconut, and half-and-half cream into the pitcher of a blender with ice; blend until the cocktail has a slushy texture. Pour the slushy mixture into a glass.

Slowly and gently drizzle the dark rum over the drink so it just floats on top; serve.