What is Shrinkage?
Shrinkage
Shrinkage in a bakery is the reduction in the quantity or weight of ingredients or finished product from the initial amount due to factors like evaporation during baking, spoilage, or accidental waste. Understanding shrinkage is crucial because it directly impacts your actual food cost and profit margin on every batch you produce.
Formula
Actual Food Cost % = (Ingredient Cost + Shrinkage Cost) / Selling Price x 100
Let's break this down with a real example:
Scenario: You make a batch of 1000g of cookie dough. Theoretical ingredient cost is $5.45. You sell the cookies by weight, and after baking, you have 800g of sellable cookies.
1. **Calculate theoretical cost per gram:** $5.45 / 1000g = $0.00545 per gram.
2. **Calculate the cost of lost product (shrinkage cost):** 200g lost x $0.00545/g = $1.09.
3. **Calculate total actual cost:** Theoretical Ingredient Cost + Shrinkage Cost = $5.45 + $1.09 = $6.54.
4. **Calculate actual food cost per gram:** $6.54 / 800g = $0.008175 per gram.
5. **If you sell the 800g for $15.00 total (which is $1.875 per 100g or $0.01875 per gram), your Food Cost % is:** ($6.54 / $15.00) x 100 = 43.6%.
If you had only considered the theoretical cost ($5.45 / $15.00) x 100 = 36.3%, you would have significantly underestimated your true food cost.Example
Let's calculate shrinkage for a single 9-inch chocolate cake that yields approximately 12 portions. Your recipe requires: * 300g All-Purpose Flour @ $1.00/kg = $0.30 * 300g Granulated Sugar @ $1.20/kg = $0.36 * 60g Unsweetened Cocoa Powder @ $4.00/kg = $0.24 * 1.5 tsp Baking Soda (approx 8g) @ $2.00/kg = $0.016 * 1 tsp Salt (approx 5g) @ $0.50/kg = $0.0025 * 2 Large Eggs (approx 100g) @ $0.25 each = $0.50 * 240ml Milk (approx 245g) @ $0.80/L = $0.196 * 120ml Vegetable Oil (approx 105g) @ $2.50/L = $0.2625 * 1 tsp Vanilla Extract (approx 5g) @ $20.00/L = $0.10 * 240ml Hot Water (approx 240g) @ $0.00/L = $0.00 **Theoretical Ingredient Cost for 1200g of batter:** $2.079 **Theoretical Cost Per Gram:** $2.079 / 1200g = $0.0017325/g **Theoretical Cost Per Portion (assuming 120g batter/portion):** 120g * $0.0017325/g = $0.2079 Now, let's consider shrinkage. During baking, the cake loses moisture. Your 1200g of batter might bake down to 1050g. Additionally, you might trim the cake for a flat surface for frosting, losing another 30g. You also might have a small amount of batter sticking to the bowl or measuring cups, say 20g. **Total Actual Usable Product:** 1050g (baked cake) - 30g (trimming) = 1020g. (We're not including the 20g stuck to the bowl here, as that's typically accounted for in the recipe yield itself if you measure everything). **Lost Product Due to Shrinkage:** 1200g (batter) - 1020g (usable cake) = 180g. **Cost of Lost Product (Shrinkage Cost):** 180g * $0.0017325/g = $0.31185 **Actual Ingredient Cost for the Batch:** $2.079 (theoretical) + $0.31185 (shrinkage) = $2.39085 **Actual Cost Per Usable Gram:** $2.39085 / 1020g = $0.002344/g **Actual Cost Per Portion (120g):** 120g * $0.002344/g = $0.2813 **Insight:** Your cost per portion has increased from $0.21 to $0.28 due to shrinkage. If you were pricing this cake based on the theoretical cost, you're losing money on every cake sold. You need to factor this shrinkage into your pricing to ensure profitability. This means the actual selling price needs to cover the cost of the ingredients that evaporated or were trimmed away.
Understanding Shrinkage
Imagine you're making a batch of your signature chocolate chip cookies. Your recipe calls for 1000g of dough. You carefully measure everything: 500g butter at $4.00/kg, 600g flour at $1.00/kg, 300g sugar at $1.20/kg, 200g chocolate chips at $5.00/kg, and 100g eggs at $0.25 each. Your theoretical ingredient cost for this 2100g of dough is $5.45. But then you bake. During baking, water evaporates from the cookies, and some dough might stick to the sheet pans or get dropped. Let's say you end up with 1800g of baked cookies. That 300g difference is your shrinkage. If you sell those cookies by weight, or if you were planning to portion that dough into specific sizes and some got wasted, that lost product represents lost revenue and increased cost per usable unit. This shrinkage isn't just about baked goods losing water. It also applies to ingredients. For example, if you buy a 10kg bag of flour and store it for a month, a small amount might evaporate or get contaminated. Or, if you're making a ganache, some chocolate might stick to your spatula and bowl, or a portion might be used for testing consistency. Every gram lost before it becomes a sellable product is shrinkage. If your recipe for 1000g of cookie dough costs $5.45 theoretically, but you only end up with 800g of usable product due to shrinkage, your actual ingredient cost per 100g of finished cookie is now $0.68 ($5.45 / 800g * 100g). If you were pricing based on the theoretical cost, you're undercharging. This is why accounting for shrinkage is vital for accurate pricing and profitability.
How BakeOnyx Helps
BakeOnyx automatically calculates your recipe shrinkage when you enter your yields. You input your initial batter weight and the final baked product weight, and the software tracks the difference. This ensures your food cost calculations are always based on actual product output, not just theoretical ingredient weights.
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Ready to Transform Your Bakery?
Join hundreds of baking businesses using BakeOnyx to manage orders, recipes, inventory, and more. Start your free trial today — no credit card required.
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