CRUST:

1 1/2 c. crushed oreos
1/4 c. melted butter

FILLING:

2 (8 oz.) pkg. cream cheese
1 pt. sour cream
3 eggs
1 c. sugar
1 tsp. vanilla
1 tsp. flour
1 1/2 c. mini chocolate chips

Mix crust ingredients and press into bottom of springform pan. Blend cream cheese until fluffy. Beat in sugar and then add eggs one at a time and blend thoroughly. Add sour cream and vanilla and beat. Fold in 3/4 cup mini chocolate chips.

Pour filling into pan and sprinkle the remaining chocolate chips (tossed in the teaspoon flour) over the top. Bake uncovered at 300 degrees for 1 1/2 hours. Let cool in oven for 1/2 hour with oven turned off.