Ok I've got ingredient's and everything but how do I actually 'bake' a sylesti?

You'll need a Sylesti Spice. These can be extracted from rare or better pets. To do that, you get a pet to sorta low health (without killing it), open your traps, and then use the one with the minty looking thin on it. This has a chance to give you a sylestia spice.

Now that you have a spice, your going to want to go bake the pet. In the species selector; go to the species of spice you have. Then click on the rarity (rare, epic, legendary) Then insert the ingredients needed in the top slots.

Here is the ingredient list by species. Also, the higher the rarity, the higher amount of ingredients you will need!
Species and Ingredients
Blueberry Crumble Aurleon = Blueberries + Oats

Mint Chocolate Chip Bulbori = Mint Leaves + Ice Cream

Frosted Sugar Cookie Draeyl = Sprinkles + Holiday Frosting

Peppermint Bark Faelora = Candy Canes + White Chocolate Bars

Cherry Cheesecake Griffi = Cherries + Cream Cheese

Chocolate Fudge Kelpari = Chopped Nuts + Chocolate Bars

Banana Pudding Luffox = Bananas + Vanilla Wafers

Rosenmunnar Cookie Lunemara = Powdered Sugar + Jar of Jam

Orange Cake Lupora = Orange Slices + Shredded Coconut

Fruitcake Morkko = Dried Berries + Raisins

Chocolate Cream Pie Nephini = Whipped Cream + Choco Shavings

Gingerbread Cookie Nytekrie = Ground Spices + Gum Drops

Peanut Brittle Qitari = Peanuts + Cup of Sugar

Christmas Pudding Sylvorpa = Dried Fruits + Flamable Sauce

Red Velvet Cake Vulnyx = Red Food Colouring + Velvet Frosting

Pecan Pie Zolnixi = Pecans + Pie Crust
Credit goes to Arkantha :D

If you have any questions about this feel free to ask :)

Thank you ^-^ Unfortunately, me being me, I sold both of my extractors before I thought that I needed them XD

Thats what I did too :P You can also buy spices off the broker for around 50k

Haha I'm glad it wasn't just me! Thank you