Preheat oven to 350°

Grease and flour two 9 x 1 1/2 inch layer pans.

Stir flour, soda, salt and brown sugar together in large bowl.

Add shortening, 2/3 of butter milk and vanilla.

beat 2 minutes, medium on mixer or 300 strokes by hand. Scrape sides and bottom of bowl constantly.

Add rest of buttermilk, eggs, and chocolate. Beat 2 more minutes, scraping bowl frequently.

Pour into prepared pans and bake for 30 to 35 minutes. (This also makes an extra large loaf cake.)