Preheat oven to 325°F (163°C).
Combine graham cracker crumbs and melted butter. Press mixture firmly into the bottom of a 9-inch springform pan.
In a large bowl, beat cream cheese and sugar until smooth. Add vanilla extract.
Mix in eggs one at a time, scraping down sides as needed.
Add sour cream and flour, and mix until just combined.
Pour batter over crust and smooth the top.
Bake for 50-60 minutes until edges are set but the center is slightly jiggly.
Turn off oven, crack the door, and let cheesecake cool inside for 1 hour.
Refrigerate for at least 4 hours or overnight.
Before serving, top with fresh raspberries and drizzle with warmed raspberry jam.