diff --git a/nox/sessions.py b/nox/sessions.py
index c97c7eb2..5d1b35c0 100644
--- a/nox/sessions.py
+++ b/nox/sessions.py
@@ -16,6 +16,7 @@
 import enum
 import hashlib
 import os
+import pathlib
 import re
 import sys
 import unicodedata
@@ -184,6 +185,13 @@ def create_tmp(self) -> str:
         self.env["TMPDIR"] = tmpdir
         return tmpdir
 
+    @property
+    def cache_dir(self) -> pathlib.Path:
+        """Create and return a 'shared cache' directory to be used across sessions."""
+        path = pathlib.Path(self._runner.global_config.envdir).joinpath(".cache")
+        path.mkdir(exist_ok=True)
+        return path
+
     @property
     def interactive(self) -> bool:
         """Returns True if Nox is being run in an interactive session or False otherwise."""
diff --git a/tests/test_sessions.py b/tests/test_sessions.py
index f12f02c7..3c949e64 100644
--- a/tests/test_sessions.py
+++ b/tests/test_sessions.py
@@ -99,15 +99,20 @@ def test_create_tmp_twice(self):
 
     def test_properties(self):
         session, runner = self.make_session_and_runner()
+        with tempfile.TemporaryDirectory() as root:
+            runner.global_config.envdir = root
 
-        assert session.name is runner.friendly_name
-        assert session.env is runner.venv.env
-        assert session.posargs == runner.global_config.posargs
-        assert session.virtualenv is runner.venv
-        assert session.bin_paths is runner.venv.bin_paths
-        assert session.bin is runner.venv.bin_paths[0]
-        assert session.python is runner.func.python
-        assert session.invoked_from is runner.global_config.invoked_from
+            assert session.name is runner.friendly_name
+            assert session.env is runner.venv.env
+            assert session.posargs == runner.global_config.posargs
+            assert session.virtualenv is runner.venv
+            assert session.bin_paths is runner.venv.bin_paths
+            assert session.bin is runner.venv.bin_paths[0]
+            assert session.python is runner.func.python
+            assert session.invoked_from is runner.global_config.invoked_from
+            assert session.cache_dir == Path(runner.global_config.envdir).joinpath(
+                ".cache"
+            )
 
     def test_no_bin_paths(self):
         session, runner = self.make_session_and_runner()