Homemade Strawberry Pie Filling is easy to make using frozen strawberries (and no Jell-O)! This allows you to enjoy the fresh flavors of summer all year round!
In a small bowl, whisk the sugar and cornstarch together.
1 cup granulated sugar, ½ cup cornstarch
Add the frozen strawberries, sugar mixture, lemon juice, and vanilla extract to a large saucepan. Cook over medium-low heat for about 3 minutes, stirring occasionally, until the strawberries begin to release their juices.
Increase the heat to medium and continue cooking for 15–20 minutes, stirring every few minutes, until the filling is noticeably thick and no longer cloudy. It should coat the back of a spoon and briefly hold a line when stirred.
Remove from heat and cool for 1 hour. Pour into a fully baked pie shell and refrigerate until ready to serve.
Notes
Cornstarch thickens with heat, not while cooling. The filling should already be thick before it comes off the stove.
If the filling tastes starchy, it likely didn't simmer long enough. A few minutes of gentle bubbling removes the raw cornstarch flavor.
Store the cooled filling in an airtight container in the refrigerator for up to 4 days.
Nutrition calculations are for the filling only and do not include crust or toppings.