diff --git a/Library/Homebrew/env_config.rb b/Library/Homebrew/env_config.rb
index 155c80660b1b1..9a33b83c3a46a 100644
--- a/Library/Homebrew/env_config.rb
+++ b/Library/Homebrew/env_config.rb
@@ -91,6 +91,9 @@ module EnvConfig
         description:  "Use this as the browser when opening project homepages.",
         default_text: "`$BROWSER` or the OS's default browser.",
       },
+      HOMEBREW_BUNDLE_USER_CACHE:                {
+        description: "If set, use this directory as the `bundle`(1) user cache.",
+      },
       HOMEBREW_CACHE:                            {
         description:  "Use this directory as the download cache.",
         default_text: "macOS: `$HOME/Library/Caches/Homebrew`, " \
diff --git a/Library/Homebrew/sorbet/rbi/dsl/homebrew/env_config.rbi b/Library/Homebrew/sorbet/rbi/dsl/homebrew/env_config.rbi
index 795c49493b297..ae282cccbec4d 100644
--- a/Library/Homebrew/sorbet/rbi/dsl/homebrew/env_config.rbi
+++ b/Library/Homebrew/sorbet/rbi/dsl/homebrew/env_config.rbi
@@ -52,6 +52,9 @@ module Homebrew::EnvConfig
     sig { returns(T.nilable(::String)) }
     def browser; end
 
+    sig { returns(T.nilable(::String)) }
+    def bundle_user_cache; end
+
     sig { returns(String) }
     def cache; end
 
diff --git a/Library/Homebrew/utils/gems.rb b/Library/Homebrew/utils/gems.rb
index 46ffca2f79a97..6766db8b56cf2 100644
--- a/Library/Homebrew/utils/gems.rb
+++ b/Library/Homebrew/utils/gems.rb
@@ -224,7 +224,6 @@ def install_bundler_gems!(only_warn_on_failure: false, setup_path: true, groups:
     old_path = ENV.fetch("PATH", nil)
     old_gem_path = ENV.fetch("GEM_PATH", nil)
     old_gem_home = ENV.fetch("GEM_HOME", nil)
-    old_bundle_user_cache = ENV.fetch("BUNDLE_USER_CACHE", nil)
     old_bundle_gemfile = ENV.fetch("BUNDLE_GEMFILE", nil)
     old_bundle_with = ENV.fetch("BUNDLE_WITH", nil)
     old_bundle_frozen = ENV.fetch("BUNDLE_FROZEN", nil)
@@ -244,12 +243,9 @@ def install_bundler_gems!(only_warn_on_failure: false, setup_path: true, groups:
     groups |= (user_gem_groups & valid_gem_groups)
     groups.sort!
 
-    homebrew_cache = if defined?(HOMEBREW_CACHE)
-      HOMEBREW_CACHE.to_s
-    else
-      ENV.fetch("HOMEBREW_CACHE")
+    if (homebrew_bundle_user_cache = ENV.fetch("HOMEBREW_BUNDLE_USER_CACHE", nil))
+      ENV["BUNDLE_USER_CACHE"] = homebrew_bundle_user_cache
     end
-    ENV["BUNDLE_USER_CACHE"] = "#{homebrew_cache}/bundler_cache"
     ENV["BUNDLE_GEMFILE"] = gemfile
     ENV["BUNDLE_WITH"] = groups.join(" ")
     ENV["BUNDLE_FROZEN"] = "true"
@@ -346,7 +342,6 @@ def install_bundler_gems!(only_warn_on_failure: false, setup_path: true, groups:
       ENV["BUNDLE_GEMFILE"] = old_bundle_gemfile
       ENV["BUNDLE_WITH"] = old_bundle_with
       ENV["BUNDLE_FROZEN"] = old_bundle_frozen
-      ENV["BUNDLE_USER_CACHE"] = old_bundle_user_cache
     end
   end
 end
diff --git a/bin/brew b/bin/brew
index f7b47d0c699c5..e83837ecedc6f 100755
--- a/bin/brew
+++ b/bin/brew
@@ -144,6 +144,7 @@ MANPAGE_VARS=(
   BAT_CONFIG_PATH
   BAT_THEME
   BROWSER
+  BUNDLE_USER_CACHE
   DISPLAY
   EDITOR
   NO_COLOR
diff --git a/docs/Manpage.md b/docs/Manpage.md
index fc62d4e58f1f1..54818ad3f3ddf 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -3568,6 +3568,10 @@ command execution e.g. `$(cat file)`.
   
   *Default:* `$BROWSER` or the OS's default browser.
 
+`HOMEBREW_BUNDLE_USER_CACHE`
+
+: If set, use this directory as the `bundle`(1) user cache.
+
 `HOMEBREW_CACHE`
 
 : Use this directory as the download cache.
diff --git a/manpages/brew.1 b/manpages/brew.1
index 673a07c724479..b9ba94c5e5faa 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -2295,6 +2295,9 @@ Use this as the browser when opening project homepages\.
 \fIDefault:\fP \fB$BROWSER\fP or the OS\[u2019]s default browser\.
 .RE
 .TP
+\fBHOMEBREW_BUNDLE_USER_CACHE\fP
+If set, use this directory as the \fBbundle\fP(1) user cache\.
+.TP
 \fBHOMEBREW_CACHE\fP
 Use this directory as the download cache\.
 .RS