The added item widget displays the items added to cart, item type (if it's an item variation), price, and quantity. The appearance can be styled by opening the option panel:
Here you can specify the spacing, background color, and separator line color. You can also specify the font size and color for the item-name, price, and info. To change the typeface, select the Added Item widget and style the type through the Text Panel.
The default item-remove button looks like this:
Shape: Can be either square or circle.
Icon: Refers to the x.
Here you can style the quantity box.
Apply any fill colors/images and strokes to the Minicart’s Content Area, not the accordion. This should appear in the upper left of Muse.