Preheat oven to 350℉.
In a small sauce pot over low heat, add raspberries and sugar. Gently mash berries with a fork and mix with sugar for about 3 minutes, until it reaches the consistency of a runny preserve. Let cool.
⅔ cup raspberries (about 20 large berries), 2 tablespoons granulated sugar
In a food processor, pulse crackers and sugar until fine crumbs. Place in a bowl and mix together with melted butter, using a fork.
10 ounces graham crackers, ¼ cup granulated sugar, 1 stick salted butter
Using your fingers, press graham cracker crust evenly into the bottom of a 9 x 13 baking dish.
Bake crust for 10 minutes, then remove from oven and let cool for a few minutes.
Using a stand mixer with flat beater attachment or a handheld electric mixer, add cream cheese, sugar, and lemon zest, and mix well.
16 ounces cream cheese, softened, 1 cup granulated sugar, Zest of 1 lemon
Next, add sour cream, lemon juice, flour, and vanilla extract, and mix again.
¼ cup sour cream, 2 tablespoons lemon juice, ¼ cup all purpose flour, sifted, 1 ½ teaspoons vanilla extract
Lastly, add eggs and mix until smooth.
2 large eggs
Pour cheesecake mixture on top of graham cracker crust and spread out evenly using a rubber spatula. Add spoonfuls of raspberry mixture in several places on top of cheesecake and swirl using a chopstick.
Bake for 35 minutes. Refrigerate for at least 2 hours before serving.
Tip: Cut and serve cheesecake bars using a thin flat metal spatula.