The same question was asked when I posted the recipe on the old board...
...and my reply was (is):
The bread recipe that this almond paste comes from calls for this homemade almond paste "OR 3/4 cup (7 ounces) store-bought almond paste" mixed with one egg white and one tablespoon of
butter.
Simply put, I would comfortably substitute
the homemade almond paste for 7 ounces of
store-bought.
I believe the addition of the egg white and
butter is to make the store-bought paste
more workable (softer), and hence more
conducive to success in the bread recipe.
Michael