diff --git a/core/lib/Drupal/Core/Template/TwigExtension.php b/core/lib/Drupal/Core/Template/TwigExtension.php
index 8270c66..ed9ed3d 100644
--- a/core/lib/Drupal/Core/Template/TwigExtension.php
+++ b/core/lib/Drupal/Core/Template/TwigExtension.php
@@ -54,6 +54,13 @@ class TwigExtension extends \Twig_Extension {
   protected $dateFormatter;
 
   /**
+   * An empty attributes object that can be cloned.
+   *
+   * @var \Drupal\Core\Template\Attribute
+   */
+  protected $attributes;
+
+  /**
    * Constructs \Drupal\Core\Template\TwigExtension.
    *
    * @param \Drupal\Core\Render\RendererInterface $renderer
@@ -135,6 +142,7 @@ public function getFunctions() {
       new \Twig_SimpleFunction('attach_library', [$this, 'attachLibrary']),
       new \Twig_SimpleFunction('active_theme_path', [$this, 'getActiveThemePath']),
       new \Twig_SimpleFunction('active_theme', [$this, 'getActiveTheme']),
+      new \Twig_SimpleFunction('create_attribute', [$this, 'createAttribute']),
     ];
   }
 
@@ -600,4 +608,25 @@ public function safeJoin(\Twig_Environment $env, $value, $glue = '') {
     }, (array) $value));
   }
 
+  /**
+   * Creates an Attribute object.
+   *
+   * @param array $attributes
+   *   An associative array of key-value pairs to be converted to attributes.
+   *
+   * @return \Drupal\Core\Template\Attribute
+   *   An attributes object that has the given attributes.
+   */
+  public function createAttribute(array $attributes = []) {
+    if (empty($attributes)) {
+      if (!$this->attributes) {
+        $this->attributes = new Attribute();
+      }
+
+      return clone $this->attributes;
+    }
+
+    return new Attribute($attributes);
+  }
+
 }
diff --git a/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php b/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php
index ea93703..bbd22e2 100644
--- a/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php
+++ b/core/tests/Drupal/Tests/Core/Template/TwigExtensionTest.php
@@ -299,6 +299,27 @@ public function testRenderVarWithGeneratedLink() {
     $this->assertEquals('<a href="http://example.com"></a>', $result);
   }
 
+  /**
+   * @covers ::createAttribute
+   */
+  public function testCreateAttribute() {
+    $renderer = $this->prophesize(RendererInterface::class);
+    $extension = new TwigExtension($renderer->reveal());
+
+    $loader = new StringLoader();
+    $twig = new \Twig_Environment($loader);
+    $twig->addExtension($extension);
+
+    $iterations =  [
+      ['class' => ['kittens']],
+      [],
+      []
+    ];
+    $result = $twig->render("{% for iteration in iterations %}<div{{ create_attribute(iteration) }}></div>{% endfor %}", ['iterations' => $iterations]);
+    $expected = '<div class="kittens"></div><div></div><div></div>';
+    $this->assertEquals($expected, $result);
+  }
+
 }
 
 class TwigExtensionTestString {