Substitute for Red Pepper Flakes (Crushed)
Dried, crushed red chili peppers used to add heat to pizza, pasta, stir fries, and marinades.
The Best Substitute
The Professor's top pick for replacing red pepper flakes (crushed) is Cayenne Pepper at a ratio of 1/2 teaspoon cayenne = 1 teaspoon red pepper flakes. This works well for all applications. There are 2 total substitutes listed below, each suited for different situations. Scroll down for complete details on every option, including what to use each one for and what to avoid.
Best Substitutes
Cayenne Pepper
Flavor impact: Cayenne is hotter and more evenly distributed (powder vs flakes). Use half as much and increase to taste.
Dairy-freeFresh Hot Peppers (minced)
Flavor impact: Adds fresh, bright heat rather than dried, earthy heat. Also adds moisture.
Dairy-free
Cayenne is the most straightforward swap; it is just ground dried chili. Start with half the amount of red pepper flakes and increase since cayenne is significantly hotter.
Frequently Asked Questions
Moderately. They are roughly 30,000-50,000 Scoville heat units, similar to cayenne. Heat varies by brand and pepper variety used.
The Bottom Line
If you are out of red pepper flakes (crushed), the best all-around substitute is cayenne pepper. Pay attention to the ratio, since substitutes rarely work at exactly 1:1. Consider what role red pepper flakes (crushed) plays in your recipe; whether it provides flavor, texture, acidity, or structure; and choose the substitute that best fills that specific role. When in doubt, start with less and adjust to taste.
Source: Culinary reference | Last verified: March 19, 2026