Prepare the Mix: In a large mixing bowl, combine 1 bag (4.4 oz) of Dole pineapple soft serve mix, 4 cups of cold water, and 1 cup of heavy whipping cream. Stir thoroughly with a spoon or whisk until the mixture is smooth and fully blended.

Check Consistency: The mixture should look like a pale yellow pineapple liquid. Make sure there are no lumps or clumps in the soft serve mix for a perfectly creamy final result.

Pour into Ninja Slushi: Carefully transfer the pineapple mixture into your Ninja Slushi machine. Pour slowly to avoid spilling, ensuring the liquid settles evenly in the machine.

Select Settings: Turn on the Ninja Slushi and choose the 'milkshake' cycle. Adjust the texture control if your machine allows, so the final soft serve comes out light and fluffy.

Wait for the Cycle to Complete: Let the machine run for approximately 36 minutes. When the machine beeps, check the consistency it should be thick, creamy, and scoopable, just like the classic Dole Whip.

Serve and Enjoy: Scoop the soft serve into bowls or cups immediately. Optional: garnish with fresh pineapple chunks or a drizzle of fruit syrup. For other flavors, simply swap the pineapple mix with raspberry, mango, or cherry soft serve mix and follow the same steps.