Cover - shares	9 Months Ended
	Oct. 01, 2023	Nov. 11, 2023
Cover [Abstract]
Entity Registrant Name	BT BRANDS, INC.
Entity Central Index Key	0001718224
Document Type	10-Q
Amendment Flag	false
Current Fiscal Year End Date	--01-01
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	true
Entity Current Reporting Status	Yes
Document Period End Date	Oct. 01, 2023
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2024
Entity Ex Transition Period	false
Entity Common Stock Shares Outstanding		6,246,118
Entity File Number	333-233233
Entity Incorporation State Country Code	WY
Entity Tax Identification Number	90-1495764
Entity Interactive Data Current	Yes
Entity Address Address Line 1	405 Main Avenue West
Entity Address Address Line 2	Suite 2D
Entity Address City Or Town	West Fargo
Security Exchange Name	NASDAQ
Entity Address Postal Zip Code	58078
City Area Code	307
Local Phone Number	223-1663
Security 12b Title	Common Stock, $0.002 per share
Trading Symbol	BTBD
Entity Address State Or Province	ND
Document Quarterly Report	true
Document Transition Report	false