Preheat oven to 150°C and line a large baking tray with paper.
Place butter into the Thermomix bowl and melt 3 min/90°C/speed 1.
Add remaining ingredients and blend 20 sec/speed 8.
Spread on the prepared baking tray and put into the oven for 10 minutes.
Remove and score the crackers as you wish. Return to the oven for a further 30 minutes. You may need to turn the temperature down to 140°C if they are browning too quickly. Leave in the turned off oven to dry out completely before storing in an airtight jar.