16 inch Whoopee Pie
Requires 2 batches

2 3/4
Cup
Flour
2
Tbl
Buttermilk Powder *
1
Tsp
Baking Powder
1
Tsp
Salt
1/2
Cup
Cocoa Powder
1 1/2
Cups
Sugar
1
Tsp
Baking Soda
1
Cup
Hot Water
1/2
Cup
Milk
1/2
Cup
Shortening (same as 8 Tbl) (not Hi Ratio)
2
Eggs
1
tsp
Vanilla
 
 
* For real Buttermilk, leave off buttermilk powder and 1/2 cup hot water,  use
1/2 cup Buttermilk.  If not using buttermilk, sub 1/2 cup milk with 1 tsp vinegar
mixed for buttermilk powder and 1/2 cup liquid.
 
Blend Flour and Buttermilk powder before starting.   Mix  all dry.  Then add rest
and beat well for four minutes.  Should be like pancake batter. Add water as
needed. 
Pour on parchment paper on metal sheet or 16 inch pizza pan, make mound of
about 15 inch diameter at less than an inch thick.  The max is because most home
ovens can not handle a pizza pan over 16 inch size.
Bake at 350, cooking time varies by thickness of batter, thick may be done in
8 minutes, thin may take 30 or more.  For more of a dome, chill batter for
ten minutes before cooking.  The max is because most home ovens can not
handle a pizza pan over 16 inch size.
Watch the baking, when toothpick check is clean, pull and move to a wire rack,
the edge can burn if left too long.  remove paper for soft cookie, leave on until
cool for crunch layer.
   Then make another batch for the other cookie. 
After outsides are cool, spoon filling between the two above cookies
 
Filling Recipe