Pizza Bottom Has Burnt Spots Causing Bitter Flavors

This page is part of PizzaBlab’s Pizza Making Troubleshooting Guide. It provides a practical overview of the most common causes for this problem, each with a brief explanation, actionable solution, and links to related articles for deeper understanding.
The sections are listed from most to least likely, meaning the first cause typically represents the most common reason for this issue, with likelihood decreasing as you move down the list. That said, several causes can often overlap or share similar likelihoods – it’s ultimately up to your process to identify which factors are at play.
Cause 1: Excess Bench/Dusting Flour Sticking to the Bottom of the Pizza
Explanation:
Excess flour on the bottom of the pizza burns during baking, creating bitter, burnt spots.
Solution:
Use only the minimum amount of flour necessary for handling the dough and transferring it to the oven. The type of flour is less important than limiting the quantity to what’s needed for smooth handling.
Read More:
- Guide to Pizza Dusting Flour: What It Is, Flour Options & Which to Choose
- How to Use Dusting Flour for Easy Pizza Stretching and Launching: Practical Tips
Cause 2: Burnt Flour from Previous Bakes Adhered to the Pizza During Baking
Explanation:
Burnt flour left on the baking surface from previous bakes can stick to the bottom of the pizza.
Solution:
Ensure the baking surface is clean and free of any leftover burnt flour before baking the next pizza.
Additional Notes / Information
Note that this is a different problem than The Pizza Bottom Browns Too Much/Fast (Before the Top Is Ready). The difference is that here we are dealing with localized, coarse/grainy burnt spots caused by excess dusting flour, whereas the problem linked above focused on the dough itself over-browning across larger areas, due to factors unrelated to dusting flour.
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