Creamy Pecan Pralines

1 cup brown sugar
1/2 cup evaporated milk
1/4 teaspoon vanilla
1 cup white sugar
2 tablespoons butter
1 cup pecans

Combine sugars and milk. Bring to a boil, stirring occasionally. Add butter, pecans, and vanilla. Mix completely and then do not stir anymore. Cook until temperature reaches 236 degrees (softball stage). Cool about 5 minutes. Beat until thickened. Pour out onto a well greased surface and allow to harden.