Choose the substitute based on your desired flavor: DIY blend for authenticity, harissa for tang, ras el hanout for aromatic complexity, or simpler paprika-cayenne blends for heat and color.
If using the DIY Berbere Blend or chili-cumin-paprika mixes, thoroughly blend the ground spices together.
For harissa paste, thin with a bit of oil if using as a dry rub; add directly to cooked dishes otherwise.
Add any necessary cayenne to ras el hanout to boost heat as per ratios, and toast briefly in oil to enhance aromatics.
Use substitutes at a 1:1 volume ratio for berbere unless otherwise noted, adjusting to taste and dish type.