The social icons in Foodica’s top bar come from a widget, so you can choose exactly which networks appear and how they look.

To get the look from the theme demo, set the widget’s Icon Style to Color Icon / No Background, and give all icons the same color so they sit cleanly in the top bar.
The same widget works in other areas too — many food blogs also place it in the sidebar or footer.
The plugin was previously called Social Icons Widget by WPZOOM; it’s now WPZOOM Connect and also includes sharing buttons for your posts.
See also: