1 (15 oz.) can sweetened condensed milk
1/2 c. lemon juice
1 tsp. lemon rind
1/2 c. graham cracker crumbs
1/3 c. brown sugar
1/3 c. butter, melted

Stir the milk, lemon juice, and rind until thick and smooth. Mix graham cracker crumbs, sugar, and butter. Put 2/3 in a pie pan and add milk mixture. Sprinkle the rest on top. Bake 7 minutes.