Scones

It'sThey’re one of my favorite wWestern {desserts | breads}, and the only one I'm good at.

“Western” is capitalized when it refers to the West (but not capitalized when it’s merely a descriptor, as in “western Shanghai” or “western China”).

Scones aren’t usually considered desserts here.

This time, I added some pumpkin seeds and raisins (to it, which wouldthem) to help me supply me with electrolytes and trace elements.

I would omit “to them.”

Suggestion:
This time, I added some pumpkin seeds and raisins to give me extra minerals and electrolytes.

Scones

"Scone" works as a title here, but since your grasp of English is very good we focus on smaller details.

From the rest of your passage, you are explain you made more than one scone. So for your title you should use "Scones" instead of "Scone" to indicate you are referring to the entire collection of scones that you made and not 1 specific scone!

This time, I added some pumpkin seeds and raisins to it, which would help me supply electrolytes and trace elements.

You don't need the ",". Try reading the sentence as "This time, which would help me supply electrolytes and trace elements". You can see that it is missing the "pumpkin seeds" and "raisins" to make the sentence make sense!

Also, trace elements sounds a little too scientific! A more common word to replace this would be "minerals".

I made some scones for tomorrow's hike.

It's one of my favorite western desserts, and the only one I'm good at making.

This time, I added some pumpkin seeds and raisins to it, which would help me supply electrolytes and trace elementssupplies mineral nutrients to the body.

Minerals generally do this.

It'sTheyre one of my favorite western desserts, and the only one I'm good at.

This time, I added some pumpkin seeds and raisins to ithem, which would help me supply electrolytes and trace elements.