The sprinkles will stick without any help due to the condensation from the fridge. If they’re not sticking, you can use just a dab of frosting to apply them.
Do not overcook your chocolate. Even if the chips still look like they have their shape, they could still already be melted. The chocolate has to be stirred for the best results.
Toll House has been the best brand of chocolate chips for this recipe, so far.
The chocolate may want to seize a bit when first adding the frosting. That’s ok, just stir vigorously and it will combine and loosen up.
Do not use food coloring that is water based or it will seize the chocolate and ruin the fudge.