The oval or wedge-shaped leaves of frosted hawthorn are alternatively arranged and measure 1 to 2 inches (2.5 to 5 centimeters) long and 1 to 2 inches (2.5 to 5 centimeters) across. They are widest below the middle, with a broadly pointed tip and rounded base. The green to reddish, hairless stems are 0.5 to 2 inches (1.3 to 5 centimeters) long. The leaves have shallow lobes with 3 to 4 lobes on each side and doubly serrated margins. Undersides are pale.

Frosted hawthorn flowers are arranged in short-stalked corymbs found in leaf axils, typically featuring a few blossoms per corymb. Each flower measures approximately 3/4 to 1 inch (1.9 to 2.5 cm) across and consists of 5 petals. These blooms have 20 stamens, usually with pink anthers. Flowering occurs from April to May, and the flowers emit an unpleasant odor that attracts midges for fertilization.

The stem of frosted hawthorn features smooth, red-brown young twigs that typically display a distinctive zig-zag pattern. These twigs are notable for their bright color and smooth texture, which sets them apart from older, possibly rougher bark. The stem generally is slender, with new growth exhibiting this unique zig-zag appearance, enhancing the plant's unmistakable identification. The red-brown tone and smooth surface of these young twigs are key identifying features for frosted hawthorn.

The fruit of frosted hawthorn is a small pome, typically measuring around 0.31 to 1 inch (8-25 mm) in diameter. It showcases an alluring reddish to purplish hue with a slightly waxy, pruinose coating giving it a frosted appearance. The shape of the fruit is similar to that of related stone fruits, though it is necessary to note that frosted hawthorn's fruit contains 3 to 5 pyrenes, reminiscent of 'stones', within the flesh. These hard, seed-containing structures contribute to the classification and distinctive texture of the fruit. This feature is significant for species identification among the diverse pome-bearing plants.