In large mixer bowl, combine flour, yeast, brown sugar, sugar, soda and salt; mix well. In saucepan, heat milk and water to 120-130°F; add to flour mixture.
Add shortening, chocolate, vanilla and eggs. Blend at low speed until moistened; beat 2 minutes at medium speed.
Pour into bundt pan (or 13 x 9-inch pan which has been greased on the bottom only). Cover; let rise in warm place 30 minutes.
While cake is rising, preheat to 350 F. Bake at 350°F for 45 to 50 minutes until top springs back when touched lightly in center.
Cool completely. Remove from bundt pan onto cake plate and frost with Brown Butter Frosting.
BROWN BUTTER FROSTING
Melt butter or margarine until golden brown. Add to powdered sugar, milk and vanilla. Mix until of spreading consistency. Adjust with more milk of it's too thick or more powdered sugar if it's too thin.