Raspberry Cake Filling

Ingredients:

3 C fresh or frozen Raspberries (can do other berries or fruit)

1/3-1/2 C Sugar

1 tsp Lemon Juice

2 Tbsp Corn Starch

2 Tbsp Cold Water

1 Tbsp Raspberries Syrup Flavoring (optional - to give it extra raspberries flavor)

Directions:

1. Wash and drain the raspberries.
2. In a medium sauce pan place raspberries, sugar and lemon juice and bring to a boil over medium heat.
3. Reduce heat and simmer for 3-5 minutes.
4. Use an immersion blender to break up the berries completely. 
5. Taste for sweetness and add the raspberry syrup flavoring if needed.  
6. Use a mesh sieve over a bowl to strain out some or all of the raspberry seeds. Use the back of a large spoon to press all the juice and pulp out of the seeds.  
7. Return to the sauce pan and bring back to a simmer. (This is optional)
8. Mix the corn starch and water together to make a slurry.
9. Mix the slurry into the berries and continue to simmer for another minute stirring constantly.
10. If it is not think enough you can make more slurry and add to it one table spoon at a time and cook for one more minute.
11. Remove from heat and pour into a heat resistant container. 
12. Let cool uncovered then store in the refrigerator for up to 3 days or in the freezer for 3 months.

From: https://shanissweetart.com/recipe/raspberry-cake-filling-recipe/