Pre-heat oven to 350F. Grease a 9X13 pan.

Pulse flour, butter, brown sugar, and salt together in a food processor until it begins to come together. Press 3 cups of this mixture into pan. Bake about 10 minutes, or until browning begins on the edges. 

Melt 1 cup of dark chocolate chips, then combine with can of sweetened condensed milk. Spread this mixture over warm crust. 

Crumble remaining crust over pan in random fashion. Spoon ½ tsp dollops of raspberry preserves randomly over pan. Sprinkle remaining chocolate chips. 

Bake for 25-30 minutes, or until bubbling and slight browning occurs at edges.