When baking with margarine, avoid tub margarine and always use stick margarine or Vegan Butter. Tub margarine contains extra water for easier spreadability. This is great for things like toast but can negatively affect your baked items due to it's lower fat content and higher water content. Stick margarine still contains more water than butter in most cases but will result in better performance than tub margarine, especially in things like puff pastries, pie crusts and tart crusts.