1/2 c butter, softened
1/3 c sugar
1 c all-purpose flour
1 tbsp vanilla
4 - 8 oz cream cheese, softened
1 1/2 c sugar
4 large eggs
1 - 12 oz pack semi sweet mini morsels

Beat butter until creamy. Add 1/3 c sugar, beat well. Gradually add flour, blend well. Stir in 1 tsp vanilla. Press into bottom and 1 1/2 inches up sides of 9-inch spring form pan.

Bake at 350°F for 12-15 minutes or until golden brown. Beat cream cheese until light and fluffy. Gradually add 1 1/2 c sugar. Add eggs one at a time beating just until yellow disappears. Stir in 2 tsp vanilla. Pour 1/2 of mixture on top of crust in spring form pan. Sprinkle chocolate chips to within 3/4 of an inch from edge. Pour in remaining batter starting out and working to middle. Place on baking sheet.

Bake at 350°F for 1 hour. Cool 1 hour and serve.