Then heat the pan over medium heat and allow the mixture to come up to a boil, and cook, stirring occasionally, for about 15 to 20 minutes until the jam has thickened.

Add the jam, lemon juice, and vanilla, and beat on low speed until just combined, 30 seconds. The mixture might appear broken but that is okay.

If your homemade jam is lacking something, lemon seeds could be the answer. Instead of throwing the citrus seeds away, try using them to make pectin.

This lemon raspberry cake recipe has tender lemon cake layers, fluffy raspberry frosting, and a stunning raspberry jam filling. It's the perfect spring dessert!