Cooktop including a single input control of multiple heating elements

A method for controlling a cooktop appliance, the cooktop appliance comprising a first heating element controlled by a first control input, a second heating element adjacent to the first heating element, the second heating element controlled by a second control input, a first supply line selectively supplying a fuel to the first heating element, a second supply line selectively supplying a fuel to the second heating element, the second supply line being in fluid parallel with the first supply line, a manifold comprising a gas inlet, wherein the first and second supply lines are fluidly coupled to the manifold, a supplemental line providing fluid connection between the first supply line and the second supply line, the supplemental line comprising a bridge portion fluidly connected between the first supply line and the second supply line and a source portion fluidly connected between the bridge portion and the manifold, and a supplemental line valve provided on the supplemental line, the method comprising:

• determining that a setting of the first control input and a setting of the second control input are matched;
• detecting a presence of a cookware item covering both the first heating element and the second heating element;
• and
• enabling a predetermined cooking mode in response to determining the setting of the first and second control inputs and detecting the presence of the cookware item.