Blanching the spinach helps retain the deep green color plus it gives the spinach puree a nice creamy texture. u003cbr/u003eu003cbr/u003eThen the cold water helps bring down the temperature of spinach instantly and prevents it from browning due to overcooking. u003cbr/u003eu003cbr/u003eAdding sugar along with salt while blanching also helps retain the beautiful green color. Don’t overcook the spinach else it will lose its color, nutrition, and flavor.