The Grumpy Chef

The Spreadsheets I Built to Save My Own Kitchen

You're losing money every week and don't even know where. These 8 Excel templates show you exactly where — and how to fix it.

$47 — Instant Download

Christian Schiffner — The Grumpy Chef
Christian Schiffner
German Master Chef (Küchenmeister)
20+ Years Operations

You're Running Blind — and It's Costing You Everything

97% of restaurant operators cite rising food costs as their top challenge. 38% generated zero profit last year. Not a loss. Zero. Nothing left after 70-hour weeks.

Here's the pattern I see in every kitchen I walk into: the numbers get checked monthly. Maybe quarterly. By the time you see the damage, you've been bleeding for weeks.

That's not diagnosis. That's an autopsy.

You don't have a food cost problem. You have a visibility problem. You can't fix what you can't see — and right now, you can't see where the money is going.

8 Templates. Every Number You Need.

Each template was built in a real kitchen, for real operations. Not theory. Not a textbook exercise. These are the exact spreadsheets I built when I was rebuilding my own restaurant.

01
Recipe Costing / Plate Cost Calculator
Break down every dish to the penny. Input ingredient costs and quantities, see your true plate cost and target margin instantly.
Most operators guess plate costs within 15-20%. This template eliminates the guessing.
02
Weekly Prime Cost Tracker
Track food cost + labor cost as a percentage of revenue — the single most important number in your restaurant. Weekly, not monthly.
Prime cost over 65%? You're losing money every week. This tracker catches the trend before it kills you.
03
Menu Engineering Matrix
Classify every menu item as a Star, Plowhorse, Puzzle, or Dog. See which dishes make money and which ones just take up space.
The average restaurant has 20-30% dead weight on the menu. This matrix shows you exactly which items to cut, reprice, or promote.
04
Par Level Order Calculator
Set minimum and maximum stock levels for every item. Stop over-ordering. Stop running out mid-service.
Over-ordering is the invisible leak. This calculator keeps inventory tight without the 86'd panic.
05
Waste Tracking Log
Log every waste event by category, cost, and cause. See patterns over time — spoilage, overproduction, plate waste, prep errors.
The average restaurant wastes 4-10% of food purchased. Tracking it is the first step to halving it.
06
Delivery Profitability Calculator
See your real margin on delivery orders after platform fees, packaging, and food cost. Not the vanity revenue number — the actual profit.
Many operators lose money on delivery and don't know it. Platform fees of 15-30% eat margins fast.
07
Menu Psychology Audit Checklist
Score your menu design against 20+ psychology principles — anchoring, decoy pricing, golden triangle placement, description quality.
Menu engineering research shows a well-designed menu can increase average check by 8-15% with zero additional food cost.
08
Vendor Price Comparison Tracker
Compare pricing across vendors for your top items. Track price changes over time. Know exactly when a supplier is creeping prices.
Most operators use one supplier out of habit. A 5-minute comparison on your top 20 items can save thousands per year.

What Every Template Includes

$47 — One Payment. All 8 Templates. Yours Forever.
Instant download. No subscription. No recurring fees.

Built by a Chef. For Chefs.

Christian Schiffner
German Master Chef (Küchenmeister) · 20+ Years · Germany, Switzerland, Austria, Spain, Canada

I lost $370K CAD and rebuilt. These are the exact tools I built for my own kitchen first — when I had no budget for software and no time for consultants.

This isn't a consultant pitch. These are an operator's tools. Built from scars, not textbooks. Every formula in these spreadsheets exists because I needed it at 11pm after a double, not because some MBA thought it looked good in a slide deck.

Frequently Asked

Excel (.xlsx) files. They also work perfectly in Google Sheets — just upload to Google Drive and open with Google Sheets.
Excel or Google Sheets. That's it. No apps to install, no accounts to create, no subscriptions.
Every template uses the same simple system: yellow cells are where you type your numbers. Gray cells calculate automatically. Each file has an Instructions tab that walks you through setup step by step. If you can type a number into a cell, you can use these.
If you have a menu and buy food, these templates work. Fine dining, casual, fast-casual, food truck, catering — the math is the same. Recipe costing, prime cost, waste, and vendor tracking apply to every food service operation.
30-day money-back guarantee. No questions asked. If these templates don't help you find money you're currently losing, email christian@thegrumpychef.ca and I'll refund you within 48 hours.
Yes. Any future updates to the templates are included. When I improve a formula or add a feature, you'll get the updated files.
30-Day Money-Back Guarantee

If these templates don't help you find money you're currently losing, email christian@thegrumpychef.ca and I'll refund you within 48 hours. No questions asked.

Still Losing Money You Can't See?

Stop guessing. Start knowing.

Join operators who stopped guessing and started knowing.