diff --git a/includes/class-woocommerce.php b/includes/class-woocommerce.php
index 164e980bb19..38451d0501a 100644
--- a/includes/class-woocommerce.php
+++ b/includes/class-woocommerce.php
@@ -546,17 +546,7 @@ final class WooCommerce {
 
 		// Classes/actions loaded for the frontend and for ajax requests.
 		if ( $this->is_request( 'frontend' ) ) {
-			// Session class, handles session data for users - can be overwritten if custom handler is needed.
-			$session_class = apply_filters( 'woocommerce_session_handler', 'WC_Session_Handler' );
-			$this->session = new $session_class();
-			$this->session->init();
-
-			$this->customer = new WC_Customer( get_current_user_id(), true );
-			// Cart needs the customer info.
-			$this->cart = new WC_Cart();
-
-			// Customer should be saved during shutdown.
-			add_action( 'shutdown', array( $this->customer, 'save' ), 10 );
+			wc_load_cart();
 		}
 
 		$this->load_webhooks();
@@ -725,6 +715,39 @@ final class WooCommerce {
 		wc_load_webhooks( 'active', $limit );
 	}
 
+	/**
+	 * Initialize the customer and cart objects and setup customer saving on shutdown.
+	 *
+	 * @since 3.6.4
+	 * @return void
+	 */
+	public function initialize_cart() {
+		// Cart needs customer info.
+		if ( is_null( $this->customer ) || ! $this->customer instanceof WC_Customer ) {
+			$this->customer = new WC_Customer( get_current_user_id(), true );
+			// Customer should be saved during shutdown.
+			add_action( 'shutdown', array( $this->customer, 'save' ), 10 );
+		}
+		if ( is_null( $this->cart ) || ! $this->cart instanceof WC_Cart ) {
+			$this->cart = new WC_Cart();
+		}
+	}
+
+	/**
+	 * Initialize the session class.
+	 *
+	 * @since 3.6.4
+	 * @return void
+	 */
+	public function initialize_session() {
+		// Session class, handles session data for users - can be overwritten if custom handler is needed.
+		$session_class = apply_filters( 'woocommerce_session_handler', 'WC_Session_Handler' );
+		if ( is_null( $this->session ) || ! $this->session instanceof $session_class ) {
+			$this->session = new $session_class();
+			$this->session->init();
+		}
+	}
+
 	/**
 	 * Set tablenames inside WPDB object.
 	 */
diff --git a/includes/wc-core-functions.php b/includes/wc-core-functions.php
index ee882453cf8..67d245dbcdf 100644
--- a/includes/wc-core-functions.php
+++ b/includes/wc-core-functions.php
@@ -2255,3 +2255,14 @@ function wc_get_server_database_version() {
 		'number' => preg_replace( '/([^\d.]+).*/', '', $server_info ),
 	);
 }
+
+/**
+ * Initialize and load the cart functionality.
+ *
+ * @since 3.6.4
+ * @return void
+ */
+function wc_load_cart() {
+	WC()->initialize_session();
+	WC()->initialize_cart();
+}
diff --git a/tests/unit-tests/util/class-wc-tests-core-functions.php b/tests/unit-tests/util/class-wc-tests-core-functions.php
index 6e997f63b6e..707075f83ea 100644
--- a/tests/unit-tests/util/class-wc-tests-core-functions.php
+++ b/tests/unit-tests/util/class-wc-tests-core-functions.php
@@ -10,6 +10,17 @@
  * Core function unit tests.
  */
 class WC_Tests_Core_Functions extends WC_Unit_Test_Case {
+
+	/**
+	 * Set up test
+	 *
+	 * @return void
+	 */
+	public function setUp() {
+		parent::setUp();
+		$this->wc = WC();
+	}
+
 	/**
 	 * Test get_woocommerce_currency().
 	 *
@@ -932,4 +943,26 @@ class WC_Tests_Core_Functions extends WC_Unit_Test_Case {
 		uasort( $sorted_values, 'wc_ascii_uasort_comparison' );
 		$this->assertSame( array( 'Bélgica', 'Benin' ), array_values( $sorted_values ) );
 	}
+
+	/**
+	 * Test wc_load_cart function.
+	 *
+	 * @return void
+	 */
+	public function test_wc_load_cart() {
+		$this->assertInstanceOf( 'WC_Cart', $this->wc->cart );
+		$this->assertInstanceOf( 'WC_Customer', $this->wc->customer );
+		$this->assertInstanceOf( 'WC_Session', $this->wc->session );
+
+		$this->wc->cart = $this->wc->customer = $this->wc->session = null;
+		$this->assertNull( $this->wc->cart );
+		$this->assertNull( $this->wc->customer );
+		$this->assertNull( $this->wc->session );
+
+		wc_load_cart();
+		$this->assertInstanceOf( 'WC_Cart', $this->wc->cart );
+		$this->assertInstanceOf( 'WC_Customer', $this->wc->customer );
+		$this->assertInstanceOf( 'WC_Session', $this->wc->session );
+
+	}
 }