Mix graham cracker crumbs, 1/2 cup sugar and butter

Mix well softened cheese and 1/2 pound sugar until smooth

Add sour cream, then eggs, then flavorings until mixture is very liquid and thoroughly mixed

Preheat oven to 350 degrees

Coat a 10 inch spring-form pan well with butter

Line base with graham cracker crumb mixture

Pour batter evenly over base until just under lid of the pan

Leave enough room for the mix to rise without flowing over

Place the spring-form pan in a pan of water 1/2 inch high and bake at 350 degrees for 1 1/2 hours

Do not let the pan of water run out while baking

Watch for cracking at the top and browning