diff --git a/scrapy/downloadermiddlewares/cookies.py b/scrapy/downloadermiddlewares/cookies.py
index 34d071fd5..fd84897f2 100644
--- a/scrapy/downloadermiddlewares/cookies.py
+++ b/scrapy/downloadermiddlewares/cookies.py
@@ -82,6 +82,10 @@ class CookiesMiddleware:
 
         cookiejarkey = request.meta.get("cookiejar")
         jar = self.jars[cookiejarkey]
+
+        if request.meta.get('cookies_reset', False):
+            jar.clear()
+
         cookies = self._get_request_cookies(jar, request)
         self._process_cookies(cookies, jar=jar, request=request)