diff --git a/pkg/workloads/cortex/lib/log.py b/pkg/workloads/cortex/lib/log.py
index ce8daa2322..e83e8feab0 100644
--- a/pkg/workloads/cortex/lib/log.py
+++ b/pkg/workloads/cortex/lib/log.py
@@ -14,10 +14,29 @@
 
 import logging
 from cortex.lib import stringify
+import datetime as dt
+
+
+class MyFormatter(logging.Formatter):
+    converter = dt.datetime.fromtimestamp
+
+    def formatTime(self, record, datefmt=None):
+        ct = self.converter(record.created)
+        if datefmt:
+            s = ct.strftime(datefmt)
+        else:
+            t = ct.strftime("%Y-%m-%d %H:%M:%S")
+            s = "%s,%03d" % (t, record.msecs)
+        return s
+
 
 logger = logging.getLogger("cortex")
 handler = logging.StreamHandler()
-handler.setFormatter(logging.Formatter(logging.BASIC_FORMAT, None))
+formatter = MyFormatter(
+    fmt="%(asctime)s:%(name)s:%(levelname)s:%(message)s", datefmt="%Y-%m-%d,%H:%M:%S.%f"
+)
+handler.setFormatter(formatter)
+
 logger.addHandler(handler)
 logger.setLevel(logging.DEBUG)
 
diff --git a/pkg/workloads/cortex/onnx_serve/api.py b/pkg/workloads/cortex/onnx_serve/api.py
index 067288a2c5..fa6c714e3f 100644
--- a/pkg/workloads/cortex/onnx_serve/api.py
+++ b/pkg/workloads/cortex/onnx_serve/api.py
@@ -79,7 +79,7 @@ def after_request(response):
     if request.path != "/{}/{}".format(ctx.app["name"], api["name"]):
         return response
 
-    logger.info("[%s] %s", util.now_timestamp_rfc_3339(), response.status)
+    logger.info(response.status)
 
     predictions = None
     if "predictions" in g:
diff --git a/pkg/workloads/cortex/tf_api/api.py b/pkg/workloads/cortex/tf_api/api.py
index e6b35c016e..13a1dff5dd 100644
--- a/pkg/workloads/cortex/tf_api/api.py
+++ b/pkg/workloads/cortex/tf_api/api.py
@@ -105,7 +105,7 @@ def after_request(response):
     if request.path != "/{}/{}".format(ctx.app["name"], api["name"]):
         return response
 
-    logger.info("[%s] %s", util.now_timestamp_rfc_3339(), response.status)
+    logger.info(response.status)
 
     predictions = None
     if "predictions" in g: