I’ve found several excellent recipe developers on the internet that are trustworthy. I find that if the recipe measures ingredients by weight, they tend to be better recipes. This is particularly true for baking! If you don’t already have one, a good digital scale on amazon is a must have. This one is really good and is inexpensive. I’ve had mine for a couple of years now.
CarrieBrown.com has a lot of good recipes which are free on her website. She sells some wonderful cookbooks (I would recommend the physical copies, I don’t like the kindle versions I bought). Some of her recipes on the website might predate her conversion to a keto diet, so pay attention when you’re reading the recipes. I believe that they are all at least low-carb.
I also recommend checking out Carrie Brown on the Ketovangelist Kitchen podcast with Brian Williams (Episodes 1 - 99). The later episodes don’t include Carrie and I lost interest. My favorite episode was #26, a primer on how and when to use specific lowncarb thickeners. Episodes 40 & 41 are good for those who want to make excellent homemade, ketogenic ice creams.
I also like Maria Emmerich, some of her recipes get overly complicated for me, but they are really good. I find it easier to find her recipes using a google search than searching on her website. Search “Maria Emmerich ***** recipe”, inserting your food of choice.
Leanne Vogel has great recipes. She has a cookbook (I think she’s now in the process of writing a second). She also has free recipes on her website: healthfulpursuit.com. She has lots of recipes which have been modified to accommodate different dietary restrictions (dairy free, egg free, vegan, etc.). I’m not sure if all her recipes are Keto compliant.
Urvashi Pitre runs the food blog twosleevers.com. She has written several keto cookbooks. I can’t recommend them enough. If you have an InstantPot type pressure cooker, start with the InstantPot cookbook first. Not all her recipes on the blog are low carb or Keto. So, again, pay attention.
Kristy Sullivan has a YouTube channel Cooking Keto with Kristie and several cookbooks. Her YouTube videos start out really rough, and you have to write down the recipes as you go, but I’ve had a lot of success with them. She has also written a couple of cookbooks now. She breaks all my rules (doesn’t measure by weight) but her Miracle Biscuit recipe was my first successful attempt at a keto baked good.
I have used recipes from the KetoConnect.net website. I have had poor luck with any of their baked goods, but I like some of their other recipes. They also have a cookbook Keto Made Easy which some people have really liked.
The DietDoctor.com website has a lot of great, free recipes. They do offer a monthly subscription to their website, but you don’t need to sign up to get access to their free content which includes the recipes.
This article purports to direct you to some of the best Keto food blogs. https://www.everydayhealth.com/ketogenic-diet/living-with/blogs-keep-you-motivated-when-all-you-want-carb-fest/
I haven’t checked all of these out yet, but you might have some fun exploring. I would just keep in mind that it is easier to get good results replicating a recipe when it lists the ingredient measurements by weight (especially for baking).
Good Luck