Soy lecithin is a food additive used as an emulsifier.u003cbr/u003eu003cbr/u003eThis just means it encourages ingredients to remain one smooth, combined mixture rather than separate (think oil and water). It also helps to thicken and stabilize.u003cbr/u003eu003cbr/u003eIt's optional and I've made many no-bake cheesecakes without it but you do get a smoother, creamier result more like a traditional baked cheesecake if you use it.u003cbr/u003eu003cbr/u003eYou can u003ca href=u0022https://amzn.to/3bWd5Xdu0022 target=u0022_blanku0022 rel=u0022noreferrer noopener nofollowu0022u003epurchase a small bag of soy lecithin hereu003c/au003e or u003ca href=u0022https://amzn.to/3lrLJeZu0022 target=u0022_blanku0022 rel=u0022noreferrer noopener nofollowu0022u003eliquid lecithin hereu003c/au003e if you'd like to try it.