See if this recipe looks about right
1/4 cup melted butter plus butter for greasing the pan
1 1/2 cup all-purpose flour
1 1/2 cup whole wheat
4 teas. baking powder
1 teas. salt
1/2 teas. cinnamon
1 cup sugar
1/2 cup cocoa
1 1/2 cups milk
1 egg
Preheat the oven to 350F. Butter a 9x5 loaf pan.
Mix together the flour, baking powder, salt, cinnamon, cocoa and sugar. Beat together the milk, melted butter & egg. Make a well in the center of the dry ingredients and pour the wet ingredients into it.
Using a large spooon or rubber spatula, combine the ingredients swiftly, stirring and folding rather than beating, and stopping as soon as all the dry ingredients are moistened. The batter should be lumpy, not smooth.
Pour and scrape the batter into the buttered pan. Bake for about 45 minutes to 1 hour, or until a toothpick inserted into the center comes out clean. Cool on a rack for at least 10 minutes before removing from the pan.
I hope this is what you are looking for but it's hard to know. You can use 3 cups of all purpose flour if you want to in the recipe.