It is an icon of a pretzel. It looks like one piece of string that is looped inside of itself. Both ends come out of the middle and go in opposite directions at the bottom.
This Pretzel icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.