.button , button{
border:solid black 2px !important;
}
With this code I have provided a frame for all buttons. However, I don't want to have a frame for the buttons "searchsubmit" and "single_add_to_cart_button". How do I do that ?
I believe those are your class names. If yes, then you can add border: none !important.
button.searchsubmit,
button.single_add_to_cart_button {
border: none !important;
}