Preheat oven to 300 degrees F (150 degrees C). Mix
graham cracker crumbs, sugar, butter and cocoa.
Press onto bottom and up the sides of a 9 inch
springform pan. Set crust aside.
Beat cream cheese until smooth. Gradually add
sweetened condensed milk; beat well. Add vanilla
and eggs, and beat on medium speed until smooth.
Toss 1/3 of the miniature chocolate chips with the
1 teaspoon flour to coat (this keeps them from
sinking to the bottom of the cake). Mix into
cheese mixture. Pour into prepared crust. Sprinkle
top with remaining chocolate chips.
Bake at 300 degrees F (150 degrees C) for 1 hour.
Turn off oven (do not open oven door) and leave
the cake in the oven to cool in the oven for
another hour. Remove from oven and cool
completely. Refrigerate before removing sides of
pan. Keep cake refrigerated until time to serve.
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