Notes: First of all, you're going to want to use a Pain de Mie bread. Pain de Mie is just a type of slice packaged French bread and "la mie" refers to the soft part of the bread, which is called the crumb. It has sugar in it, which makes it sweeter than most French breads.
Preheat the oven to 350 degrees. For the dough: Beat together the butter and sugar until smooth. Stir in the 3/4 cup melted and cooled chocolate chips. Stir in the flour, baking soda and salt.