| Cover | Aug. 04, 2022 |
| Cover [Abstract] | |
| Entity Registrant Name | BT BRANDS, INC. |
| Entity Central Index Key | 0001718224 |
| Document Type | 8-K |
| Amendment Flag | false |
| Entity Emerging Growth Company | true |
| Document Period End Date | Aug. 04, 2022 |
| Entity Ex Transition Period | false |
| Entity Incorporation State Country Code | WY |
| Entity Tax Identification Number | 91-1495764 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity File Number | 000-56113 |
| Entity Address Address Line 1 | 405 West Main Avenue |
| Entity Address Address Line 2 | Suite 2D |
| Entity Address City Or Town | West Fargo |
| Entity Address State Or Province | ND |
| Entity Address Postal Zip Code | 58078 |
| Security 12b Title | Common Stock |
| Trading Symbol | BTBD |
| Security Exchange Name | NASDAQ |
| City Area Code | 307 |
| Local Phone Number | 223-1663 |
