Super easy strawberry jam butter cookies (+vegan substitutes)

Hello! I've been wanting to make these cookies for a long time and since I just got the time today I decided I'll make a post for it, and also share the recipe I used with you (a little tweaked because the original had a bunch of flaws).
This recipe should be enough for about 30 cookies.
The first batch had way too little flour (one of the mentioned flaws) so they ended up being too flat and soft:

For the second and third batch I added around 50g of flour to it, so they were more consistent and overall more cookie-ish (also less burnt, same amount of time and temp):

I added white chocolate chips to the third batch just for fun, you can barely see them though:

ingredients:
480g of flour (i used 0000 but 000 works, or, well, any wheat flour should do)
300g of butter
120g of sugar
3 egg yolks
Whatever your heart feels should be enough of vanilla extract
Jam (I used strawberry but almost any flavour should be alright)
Vegan alternative:
Instead of butter you can use the same quantity of vegetable margarine (be careful because there's non-vegetable margarine out there. Yes I'm surprised too) or vegetable oil. Also you can just not use egg yolks and it will be pretty much the same.

Preparation:
gather everything!! Best part for a goblin or those pigs i think

Now you'll want to soften the butter before this unless you're a tough folk, but just mix everything except the jam into a bowl and mix it making sure its all homogeneous. If it feels way too sticky use a handful or two of flour until it feels alright for cookie dough brain standards (aka however you like it or imagine it should be)

Gather the part 2 ingredients like jam (ignore the butter, it wasn't meant to be *cries horrendously hard *)

Preheat the oven at 150c/302f
Now look, you grab a "piece" of dough and round it with your hands, then place it in the tray ( leave around two inches/five cm between each), then squish the center making any fun shape you want like circles, hearts, or a Metatron's cube. The tray can be a non-stick tray, or you can use parchment paper, just be absolutely sure it won't stick because they're very soft even after the changes

It's alright if it looks like a cat stepped on it.
With a tea spoon scoop some jam and put it on them

Now it goes in the oven feat. skin reveal

Remember to put a timer unless you're confident you'll take good care of it
After 15 minutes they should be ready!
This whole thing took me less than an hour and a half from buying the stuff to eating them so I think that says a lot about it (in a good way), in fact i think writting is taking me more than baking this
Well i hope you liked this recipe!! If you didn't it's ok too I'll just doxx you (for moral and legal reasons I won't)