You could frame it out to include swing or retractable doors and have it be a reach-in/walk-in pantry instead of a full wall of cabinets:

Reach in Pantry · More Info

New York Transformation · More Info

what if you just did part of it as pantry and still left a little counter space to actually set stuff down?

you could do pull out shelves, and have large drawers under.

How about opening up the entire corner?... include that little pass through area with the base cabinet showing?

Would love to open the entire corner, but there are air ducts and an air return in that wall. :(

you can work around them... they'll be inside the pantry and won't show in the end.

More pantry space is the ultimate goal, right?

Have always thought 2LittleFishies used some of the prettiest cabinet set-ups throughout her kitchen.

We ended up stacking two bathroom cabinets for our pantry that is tucked next to our washer/dryer when we couldn't find kitchen pantry cabinets we liked. Just suggesting that you can consider non-kitchen cabinets - including repurposed.

https://www.houzz.com/discussions/2459739/2littlefishies-yellow-kitchen-reveal-long#n=157

That’s some prime kitchen real estate, the options are endless there!

To help you narrow down the best solution for your home, is to 1st figure out what function would be most useful for you there. It was mentioned there's no pantry closet, so storage space would be an advantage & good investment. So, a closet built out would be a great idea or pantry cabinets. If you need additional counter space then part pantry cabinets to the left & end it with a regular base cabinet with a pullout with a wall cabinet above to the far right. Could also do drawers. Just depends what you plan on putting in it to determine what will be more useful. Hope that helps.

My 2 favorite pantries (french & pocket doors)..

If want to use cabinets, would do 2-3 of these; best of both, shallow depth upper cabinets and drawer base cabinets (this configuration is what I use for my pantry, bottom drawer is wine drawer🍷).

The Brits call them larders and have some clever examples on British cabinetry websites like Masterclass.

I used the following pics as inspiration for one that I designed with my cabinet maker.

The Bloomsbury WC1 Kitchen by deVOL · More Info

Provençal by Woodale · More Info

Kitchen pantry · More Info

You might regret removing the knee opening that works really well for the dog bowls, but since you do need the space, consider adding a plinth -- toe kick -- drawer for the bowls to the bottom of any cabinet..

https://www.purewow.com/home/toe-kick-drawer-storage

As you plan your new storage, don't forget that you have a light switch or outlet on the left to consider. If it is an outlet ... no worries since it can go inside a pantry; but if it is a light switch, you may need to consider moving it if you want to end up with the deepest possible pantry.

After you move the existing cabinets to the basement or attic or garage or sell it or donate it to Habitat for Humanity or whatever, then

... for maximum storage space, create on the right side of the space a wall parallel with the wall on the left (same depth) and enclose the whole space as a wall to wall floor to ceiling closet with bi-fold closet doors and with deep wall to wall shelves built inside, preferably with adjustable height.

If you want to add to but reuse the existing storage, you'd not get as much new storage but you could

... create a wheeled cabinet to fit within the knee space of the desk cabinet

... drop the existing overhead cabinet down onto the countertop of the desk;

... build another cabinet over it.

Do let us know how it turns out.

https://www.houzz.com/discussions/5874997/small-tight-u-shape-kitchen-layout-not-many-choices-got-any-ideas
from Buehl (best pantry info I've ever read):

"About pantries...several years ago, there was a lot of discussion about pantries, with an emphasis on shelf depth. The consensus was that 12" is the "sweet spot" for shelf depth.
12" is deep enough to hold all food (cereal boxes, 2 or 3 deep cans, etc.), pantry storage containers (e.g., Tupperware), and the vast majority of small appliances (KA stand mixers, blenders, breadmakers, etc.).

12" is not so deep that things get lost in the "depths". Even 18" is too deep -- I had that in my old Kitchen and things got lost all the time! Plus you end up putting things in the front that are unrelated to those behind them.

The most efficient pantry storage is one that
1. Allows you to see everything in it with one look
2. Doesn't "let" you stack unrelated things deep (e.g., cans of peaches in front of cans of green beans or pantry storage containers holding different things, ...)
3. Utilizes the entire space floor-to-ceiling, or as close to that as possible

Pantry Types:

24" deep pantry cabinets don't meet any of the three above, made even worse when over 18" wide. Even if they have doodads that swing/pull out (and are generally expensive), storage is limited b/c of the need to accommodate the hardware and other parts to the swing out.

18" wide x 24" deep pullout pantry cabinets meet #1 & 2. BUT, they have to be pullout pantries, not shelves unattached to the door or roll out tray shelves (ROTS) (which don't work above waist level or so anyway). They work only because you can see everything when you pull the door open fully by looking at both sides. If you had to move things around, they wouldn't work.

15" deep pantry cabinets meet #1 & 2 and have the added advantage that you can look without moving things around. The 15" depth includes the back wall, so the shelves are really only 14" or so deep. (In non-IKEA framed cabinets, both the back wall and the face frame are included in the 15" depth, so shelves are 13" deep or so.)

Built-in pantries, whether reach-in, step-in, or walk-in, are the most efficient and meet all three above."

https://www.houzz.com/discussions/2578612/anyone-do-a-12-depth-pantry-cabinet

With a similar space, our KD suggested pantry cabinets on each end with a short countertop in between. Uppers over the counter have glass doors to help avoid blockiness. The pantry cabinets have pull-out shelves and give us lots of storage.

If you need space for food storage, cleaning tools, etc, design the perfect space for yourself. Pantries are a huge asset in anyone’s home and with the opportunity to design the very best interior for yourself, you can make it the best area of your kitchen. There are so many good ideas here. Take your time! That’s important real estate in your home.

Looks like the area you have isn't deep enough for a walk-in pantry but will work quite well as a reach-in pantry.

A reach-in pantry, "stick-built" by a carpenter, will be much more useful than cabinets. Bypass doors don't intrude into the walkway. Carefully plan the vertical distance between shelves for optimum usage. I have 4 of these can racks and love them. https://www.walmart.com/c/kp/can-racks

This is what we did. Kept them shallow so we were not losing things way in the back like we did with our traditional pantry cabinet.

My reach in pantry is like Sabrina's photos, with pocket doors. It's incredibly efficient with 12" shelving on the sides. In my case, I used a pretty table on the back wall and have a lamp on it and the large flour etc glass jars. I made the back wall more decorative because my pocket doors are open almost always. So much better than doors and pull out shelves. I've also had a huge walk in pantry but prefer this for Its ease of use.. good luck and Merry Christmas!

This is where I would get creative and look for a furniture piece that would fit that space. Why does it need to match the kitchen cabinets??? Let it be unique. Yet have all your needs met.

I would love the hunt, but that's just me :-)

Tall door cabinets work well for pantry storage. I like shallow depth so I can see and access any item easily. Adjustable shelving allows arranging tall and short items easily.

This is one I recently designed:

Or from a number of years ago, I designed one to look like a furniture piece (on the left):

Or, use an actual furniture piece for the pantry, like we did here:

Restoration Hardware has some great tall cabinet options.