Is frozen spinach thawed in sink overnight still safe to use dip?

It's generally not recommended to thaw frozen spinach in the sink overnight at room temperature, as this can create an environment for bacteria to grow. Instead, it's safer to thaw frozen spinach in the refrigerator overnight, in cold water for a few hours, or in the microwave using the defrost setting and checking it frequently to avoid overheating.

As long as the frozen spinach was properly stored and frozen before you took it out to start thawing, and as long as it remained cold and didn't get left out at room temperature for too long during the thawing process, it should be safe to use.

To be on the safe side, discard the water used for thawing and thoroughly cook the spinach before consumption to kill any potential bacteria. Be sure to heat it to an internal temperature of 165 degrees Fahrenheit (74 degrees Celsius) as measured by a food thermometer.

If you notice any unusual odor or appearance to the spinach after thawing, such as sliminess or discoloration, then it's best to discard it rather than risk consuming spoiled food.