There are a lot of resources available for keto shopping lists and pantry staples. I will list some of them at the end of this post. This post is a list of what's in my kitchen, the food I buy, the appliances I couldn't live without, and my cooking staples.
This is a very long list, I have been collecting my staples for many years and not everything is used regularly. Because of this, I will use a key to indicate the food I use regularly. Remember, this is just the list of foods that works for me. I could probably trim this down a lot and still make nice keto food. If you are just starting your ketogenic journey, I would recommend doing an inventory of what you already have and if any of it is keto friendly. Next, decide which part of cooking is most important for you. If it's being able to cook quickly and meal prep then maybe your staples are foods that keep well. You'll need good Tupperware that can be put in the freezer, and flavours you won't get bored of. If your priority is good value for less cost; minimise your spices to a few basics, figure out which cuts of meat are the best value for money, buy in bulk.I enjoy baking and using spices, so my priorities are making sure I always have these ingredients on hand, keeping my spice rack stocked, and having small dishes to freeze small batches of baked goods in. We also keep good cuts of meat in the freezer as well as easy to throw together lunch foods.