diff --git a/language/en-GB/mod_menu.ini b/language/en-GB/mod_menu.ini
index 0be222057ef88..01c0ddb9d2ef3 100644
--- a/language/en-GB/mod_menu.ini
+++ b/language/en-GB/mod_menu.ini
@@ -13,4 +13,5 @@ MOD_MENU_FIELD_STARTLEVEL_LABEL="Start Level"
 MOD_MENU_FIELD_TAG_ID_LABEL="Menu Tag ID"
 MOD_MENU_FIELD_TARGET_DESC="JavaScript values to position a popup window, eg top=50, left=50, width=200, height=300."
 MOD_MENU_FIELD_TARGET_LABEL="Target Position"
+MOD_MENU_TOGGLE="Toggle Navigation"
 MOD_MENU_XML_DESCRIPTION="This module displays a menu on the Frontend."
diff --git a/language/en-GB/mod_menu.sys.ini b/language/en-GB/mod_menu.sys.ini
index 2178e25fa4b34..07085d26a319f 100644
--- a/language/en-GB/mod_menu.sys.ini
+++ b/language/en-GB/mod_menu.sys.ini
@@ -4,6 +4,7 @@
 ; Note : All ini files need to be saved as UTF-8
 
 MOD_MENU="Menu"
+MOD_MENU_LAYOUT_COLLAPSE-DEFAULT="Collapsible Default Menu"
 MOD_MENU_LAYOUT_DEFAULT="Default"
 MOD_MENU_XML_DESCRIPTION="This module displays a menu on the Frontend."
 
diff --git a/language/en-GB/tpl_cassiopeia.ini b/language/en-GB/tpl_cassiopeia.ini
index 6d2add48020c6..9bfc8b9a0b751 100644
--- a/language/en-GB/tpl_cassiopeia.ini
+++ b/language/en-GB/tpl_cassiopeia.ini
@@ -21,5 +21,4 @@ TPL_CASSIOPEIA_STATIC="Static"
 TPL_CASSIOPEIA_STICKY_LABEL="Sticky Header"
 TPL_CASSIOPEIA_TAGLINE="Tagline"
 TPL_CASSIOPEIA_TITLE="Title (alternative to logo)"
-TPL_CASSIOPEIA_TOGGLE="Toggle Navigation"
 TPL_CASSIOPEIA_XML_DESCRIPTION="Continuing the space theme (Solarflare from 1.0, Milkyway from 1.5 and Protostar from 3.0), Cassiopeia is the Joomla 4 site template based on Bootstrap 5."
diff --git a/language/en-GB/tpl_cassiopeia.sys.ini b/language/en-GB/tpl_cassiopeia.sys.ini
index 3a768d2c4dd64..f2b0f2a651100 100644
--- a/language/en-GB/tpl_cassiopeia.sys.ini
+++ b/language/en-GB/tpl_cassiopeia.sys.ini
@@ -4,6 +4,7 @@
 ; Note : All ini files need to be saved as UTF-8
 
 CASSIOPEIA="Cassiopeia Site template"
+TPL_CASSIOPEIA_MOD_MENU_LAYOUT_COLLAPSE-METISMENU="Collapsible Dropdown"
 TPL_CASSIOPEIA_MOD_MENU_LAYOUT_DROPDOWN-METISMENU="Dropdown"
 TPL_CASSIOPEIA_POSITION_BANNER="Banner"
 TPL_CASSIOPEIA_POSITION_BELOW-TOP="Below Top"
diff --git a/modules/mod_menu/tmpl/collapse-default.php b/modules/mod_menu/tmpl/collapse-default.php
new file mode 100644
index 0000000000000..98313ff66d416
--- /dev/null
+++ b/modules/mod_menu/tmpl/collapse-default.php
@@ -0,0 +1,25 @@
+<?php
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  mod_menu
+ *
+ * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\HTML\HTMLHelper;
+use Joomla\CMS\Language\Text;
+
+HTMLHelper::_('bootstrap.collapse');
+?>
+
+<nav class="navbar navbar-expand-md">
+	<button class="navbar-toggler navbar-toggler-right" type="button" data-bs-toggle="collapse" data-bs-target="#navbar" aria-controls="navbar" aria-expanded="false" aria-label="<?php echo Text::_('MOD_MENU_TOGGLE'); ?>">
+		<span class="icon-menu" aria-hidden="true"></span>
+	</button>
+	<div class="collapse navbar-collapse" id="navbar">
+		<?php require __DIR__ . '/default.php'; ?>
+	</div>
+</nav>
diff --git a/templates/cassiopeia/error.php b/templates/cassiopeia/error.php
index aad7ef616e92b..be0ccf48eab16 100644
--- a/templates/cassiopeia/error.php
+++ b/templates/cassiopeia/error.php
@@ -116,15 +116,7 @@
 		<?php if ($this->countModules('menu') || $this->countModules('search')) : ?>
 			<div class="grid-child container-nav">
 				<?php if ($this->countModules('menu')) : ?>
-					<nav class="navbar navbar-expand-md">
-						<?php HTMLHelper::_('bootstrap.collapse', '.navbar-toggler'); ?>
-						<button class="navbar-toggler navbar-toggler-right" type="button" data-bs-toggle="collapse" data-bs-target="#navbar" aria-controls="navbar" aria-expanded="false" aria-label="<?php echo Text::_('TPL_CASSIOPEIA_TOGGLE'); ?>">
-							<span class="icon-menu" aria-hidden="true"></span>
-						</button>
-						<div class="collapse navbar-collapse" id="navbar">
-							<jdoc:include type="modules" name="menu" style="none" />
-						</div>
-					</nav>
+					<jdoc:include type="modules" name="menu" style="none" />
 				<?php endif; ?>
 				<?php if ($this->countModules('search')) : ?>
 					<div class="container-search">
diff --git a/templates/cassiopeia/html/mod_menu/collapse-metismenu.php b/templates/cassiopeia/html/mod_menu/collapse-metismenu.php
new file mode 100644
index 0000000000000..059a1c86ea280
--- /dev/null
+++ b/templates/cassiopeia/html/mod_menu/collapse-metismenu.php
@@ -0,0 +1,25 @@
+<?php
+/**
+ * @package     Joomla.Administrator
+ * @subpackage  mod_menu
+ *
+ * @copyright   (C) 2009 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\HTML\HTMLHelper;
+use Joomla\CMS\Language\Text;
+
+HTMLHelper::_('bootstrap.collapse');
+?>
+
+<nav class="navbar navbar-expand-md">
+	<button class="navbar-toggler navbar-toggler-right" type="button" data-bs-toggle="collapse" data-bs-target="#navbar" aria-controls="navbar" aria-expanded="false" aria-label="<?php echo Text::_('MOD_MENU_TOGGLE'); ?>">
+		<span class="icon-menu" aria-hidden="true"></span>
+	</button>
+	<div class="collapse navbar-collapse" id="navbar">
+		<?php require __DIR__ . '/dropdown-metismenu.php'; ?>
+	</div>
+</nav>
diff --git a/templates/cassiopeia/index.php b/templates/cassiopeia/index.php
index 285a44b4f74eb..ca8058061912b 100644
--- a/templates/cassiopeia/index.php
+++ b/templates/cassiopeia/index.php
@@ -147,15 +147,7 @@
 		<?php if ($this->countModules('menu', true) || $this->countModules('search', true)) : ?>
 			<div class="grid-child container-nav">
 				<?php if ($this->countModules('menu', true)) : ?>
-					<nav class="navbar navbar-expand-md">
-						<?php HTMLHelper::_('bootstrap.collapse', '.navbar-toggler'); ?>
-						<button class="navbar-toggler navbar-toggler-right" type="button" data-bs-toggle="collapse" data-bs-target="#navbar" aria-controls="navbar" aria-expanded="false" aria-label="<?php echo Text::_('TPL_CASSIOPEIA_TOGGLE'); ?>">
-							<span class="icon-menu" aria-hidden="true"></span>
-						</button>
-						<div class="collapse navbar-collapse" id="navbar">
-							<jdoc:include type="modules" name="menu" style="none" />
-						</div>
-					</nav>
+					<jdoc:include type="modules" name="menu" style="none" />
 				<?php endif; ?>
 				<?php if ($this->countModules('search', true)) : ?>
 					<div class="container-search">