When making apple pie, one of the most frustrating issues is that the apples can sink to the bottom during baking or leave gaps between the filling and crust. From my own experience, I found that precooking your apples before assembling your pie solves this problem entirely. The key is understanding that apples contain a natural thickening agent called pectin. Apples with high pectin levels, like Granny Smith, tend to hold their shape and thicken the filling more naturally. However, many popular varieties such as Fuji or Honeycrisp have lower pectin content, which can cause the pie filling to be runny and result in gaps or sinking. By cooking the sliced apples briefly on the stove over low to medium-low heat with a little sugar and some starch (like cornstarch), the pectin activates and thickens the mixture. This process creates a gel-like consistency that stays firm during baking. It’s crucial to remove the apple mixture before it gets too hot or cooks down too far to prevent breaking down the pectin. After letting the filling cool to room temperature, you can fill your pie crust confidently, knowing it will bake with no unexpected sinking or spacing. From my baking trials, pie fillings made from precooked apples not only maintain great texture but also blend flavors better, enhancing the overall taste. If you’re uncertain about the pectin content of the apples you have, precooking is an easy fix that guarantees a reliably thick and gap-free pie. It’s a small step that makes a big difference to your classic apple pie’s structure and appeal.