i’m assuming it was given sneakily by prince hyo cuz doram used to to the same for him when they’re at the palace.
Early on in their marriage prince was trying to find what does Doram likes from his friend that now works as palace maid. She told him that Doram likes acorn jelly. So the prince decided to arrange a whole 'nice' walk of him, Doram and company to go up the mountains in winter to find some acorns. But since he didnt explain why poor Doram felt like was punished. Until he realized that it was Prince's awkward way to try to grow closer to him. Ta!
You should all go and re-read the beginning, peeps!
What do the acorns mean? also, I LOVE THEM SO MUCH I want a sable tiger god to come to get meeeeee