Pro Tips: For the brightest green color and best texture, use gel food coloring instead of liquid. Ensure your milk is very cold before mixing with the pudding mix for proper thickening. When folding in the whipped topping, be gentle to maintain a light, airy filling. For the cleanest slices, let the frozen pie sit at room temperature for 5-10 minutes and use a hot knife. You can make this pie up to a week ahead and store it tightly wrapped in the freezer.