Christmas cookies for boyfriends Polish parents

Czesc moj przyjaciele polski!
I want to make some cookies for boyfriend's parents for Christmas. They are Polish but live in Germany. I'm wondering what sort of things are popular?

My thoughts for potential cookies were: biscotti, something with peppermint, something with lemon, or something with maple syrup/maple flavored.
Any thoughts on this? I am wracking my brain, I want to make something that will impress them in my absence, since I have to mail this from overseas to them. What is popular, what would be most impressive, any productive thoughts whatsoever are appreciated!

also any thoughts on learning this beautiful yet painstaking language are appreciated, I speak English and Spanish fluently (learned Spanish to fluency). Where I live there are no Polish classes anywhere nearby (I live in the middle of nowhere, it seems).

Dzieki! ^.^

Try Welsh cookies. I often make them and my Polish friends just love them. They're also easy to stack for shipment, and pretty durable.

Oatmeal cookies are another possibility, but they may be too delicate to survive shipment. Remember that any package you send is going to get tossed around like a basketball.

What do you mean by Welsh cookies? Do you have any examples? Americans know nothing about Welsh and I am American...
I can handle the choosing non-perishable, survivable things, I just don't know for the type of cookie.

Welsh cookies are small flat cookies baked not in the oven, but on the stovetop on a cast iron skillet. Type "Welsh cookies" into Google images.

Here's my recipe:

WELSH COOKIES

5 cups flour
2 cups sugar
3 eggs
3/4 cup milk
1 teaspoon salt
1 teaspoon cream of tartar
1 teaspoon baking powder
1 teaspoon nutmeg
2 teaspoons vanilla
2 cups butter
1 box dried currants

Sift together dry ingredients. Cream together butter and sugar.

Stir in eggs. Add dry ingredients and milk. Add currants.

Roll dough out on a lightly floured work surface and cut with a glass into rounds.

Bake on a very lightly greased cast iron skillet or griddle over medium high heat until cooked through, adjusting heat as necessary.

Take's a little practice, but you'll catch on pretty quick.

Wow, thanks...Americans and Poles sure have different taste in cookies, apparently!
Do you have any opinion on lemon-flavored cookies? Are they popular there? Because I have very easy recipe for that or maple cookies. Dzieki :)

Sorry Dominic, theyre called welsh cakes not cookies.

In the States, they're called Welsh cookies (cake means something different in American English). They're often sold for fundraisers at Welsh-American churches, especially for St. David's day.

I've never seen anything like that. Maybe it's common to another part of the US than I'm from.