Upside-Down Cake - cooking recipe

Ingredients

1 c. flour
1/4 c. salt
3/4 c. sugar
2 tsp. baking powder
1 1/2 Tbsp. cocoa
1/2 c. milk
2 Tbsp. melted butter
1 tsp. vanilla
chopped nuts (optional)

Preparation

Mix together, pour in 9 x 13-inch pan.