Preheat oven to 325°F degrees exactly.
Line baking pan with parchment paper carefully.
Mix graham crumbs, butter, and sugar together.
Press mixture into pan bottom firmly.
Bake crust for 10 minutes until golden.
Beat cream cheese until completely smooth.
Add sugar and mix until well combined.
Beat in eggs one at a time.
Mix in vanilla and sour cream gently.
Pour filling over the baked crust evenly.
Combine jam and lemon juice in bowl.
Drop spoonfuls of jam mixture on top.
Swirl with knife to create patterns.
Bake for 35 minutes until center sets.
Cool completely before cutting into bars.