The phrase "bubble form" refers to a specific way in which something is presented or organized. It means that things are arranged in the shape of bubbles, similar to balloons, round and connected.
Sentences with «bubble form»
Cook until bubbles form on top, flip and cook until golden. (84thand3rd.com)
Cook until bubbles form on top and bottoms are golden brown, about 3 minutes. (bonappetit.com)
In a medium saucepan, over medium - low heat, gently warm the cream until small bubbles form around the edges. (myownsweetthyme.com)