Remove seeds from cucumber; dice into small pieces. Dice onion into small bits.
Add cucumber, onion, cream cheese, Duke's Mayonnaise, hot sauce, kosher salt, and garlic powder into a bowl. Mix until well-combined. Taste and season additionally according to preference.
Add 2-3 drops of green food coloring for color, if desired; mix + stir. Add until the benedictine has reached your desired level of greenness.
Notes
Make sure to remove the seeds of the cucumber. This helps prevent the spread from becoming watery and maintains a better texture.
While the green food coloring is optional, it adds a nice visual touch to the spread. Start with a few drops and gradually add more until you achieve the desired shade of green.
Store any leftovers in an airtight container in the refrigerator. It should stay fresh for several days, but the texture may become slightly softer over time.