Is there a word for the pattern on pancakes and grilled cheese?

I’d like to know if there’s a word to describe the somewhat similar pattern that appears when you brown pancakes and buttered slices of bread on a pan. Does “freckled” work?

Solution 1:

I'd use mottled, certainly for the first picture.

mottled:

Something that is mottled has spots or patches with different shades or colors, like the reddish blotches that can appear on your skin if it’s exposed to extreme temperatures.

[Vocabulary.com: Dictionary]

Many moths, and a type of sculpin, are described as 'mottled'; in these cases, underlying patterns can be discerned.

Skin can indeed become mottled, and pictures on the internet can look unappetising, but a mottled apple can be more attractive. There is rarely patterning in such cases.

['Chenango Strawberry'; AdamApples]

The filigree patterning of your first picture could also be described as lacy, while a display of more chunky sectors could be described as crazed.