diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4255982..9c1ddc5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,8 @@
 
 ## 1.1.1 under development
 
-- no changes in this release.
+- Add #27: Add the parameter `$encodeValue` to the `Cookie` constructor and the `Cookie::withRawValue()` method 
+  that creates a cookie copy with a new value that will not be encoded (vjik)
 
 
 ## 1.1.0 May 05, 2021
diff --git a/README.md b/README.md
index e1a901a..e84938a 100644
--- a/README.md
+++ b/README.md
@@ -140,6 +140,13 @@ $middleware = new \Yiisoft\Cookies\CookieMiddleware(
 $response = $middleware->process($request, $handler);
 ```
 
+Create cookie with raw value that will not be encoded:
+
+```php
+$cookie = (new \Yiisoft\Cookies\Cookie('cookieName'))
+    ->withRawValue('ebaKUq90PhiHck_MR7st-E1SxhbYWiTsLo82mCTbNuAh7rgflx5LVsYfJJseyQCrODuVcJkTSYhm1WKte-l5lQ==')
+```
+
 See [Yii guide to cookies](https://github.com/yiisoft/docs/blob/master/guide/en/runtime/cookies.md) for more info.
 
 ## Testing
diff --git a/src/Cookie.php b/src/Cookie.php
index b4627c4..0709068 100644
--- a/src/Cookie.php
+++ b/src/Cookie.php
@@ -70,6 +70,11 @@ final class Cookie
      */
     private string $value;
 
+    /**
+     * @var bool Whether cookie value should be encoded.
+     */
+    private bool $encodeValue;
+
     /**
      * @var DateTimeInterface|null The maximum lifetime of the cookie.
      * If unspecified, the cookie becomes a session cookie, which will be removed
@@ -127,6 +132,7 @@ final class Cookie
      * @param bool|null $secure Whether the client should send back the cookie only over HTTPS connection.
      * @param bool|null $httpOnly Whether the cookie should be accessible only through the HTTP protocol.
      * @param string|null $sameSite Whether the cookie should be available for cross-site requests.
+     * @param bool $encodeValue Whether cookie value should be encoded.
      *
      * @throws InvalidArgumentException When one or more arguments are not valid.
      */
@@ -138,14 +144,16 @@ public function __construct(
         ?string $path = '/',
         ?bool $secure = true,
         ?bool $httpOnly = true,
-        ?string $sameSite = self::SAME_SITE_LAX
+        ?string $sameSite = self::SAME_SITE_LAX,
+        bool $encodeValue = true
     ) {
         if (!preg_match(self::PATTERN_TOKEN, $name)) {
             throw new InvalidArgumentException("The cookie name \"$name\" contains invalid characters or is empty.");
         }
 
         $this->name = $name;
-        $this->setValue($value);
+        $this->value = $value;
+        $this->encodeValue = $encodeValue;
         $this->expires = $expires !== null ? clone $expires : null;
         $this->domain = $domain;
         $this->setPath($path);
@@ -176,7 +184,21 @@ public function getName(): string
     public function withValue(string $value): self
     {
         $new = clone $this;
-        $new->setValue($value);
+        $new->value = $value;
+        $new->encodeValue = true;
+        return $new;
+    }
+
+    /**
+     * Creates a cookie copy with a new value that will not be encoded.
+     *
+     * @param $value string Value of the cookie.
+     */
+    public function withRawValue(string $value): self
+    {
+        $new = clone $this;
+        $new->value = $value;
+        $new->encodeValue = false;
         return $new;
     }
 
@@ -190,11 +212,6 @@ public function getValue(): string
         return $this->value;
     }
 
-    private function setValue(string $value): void
-    {
-        $this->value = $value;
-    }
-
     /**
      * Creates a cookie copy with a new time the cookie expires.
      *
@@ -450,7 +467,7 @@ public function addToResponse(ResponseInterface $response): ResponseInterface
     public function __toString(): string
     {
         $cookieParts = [
-            $this->name . '=' . urlencode($this->value),
+            $this->name . '=' . ($this->encodeValue ? urlencode($this->value) : $this->value),
         ];
 
         if ($this->expires !== null) {
diff --git a/tests/CookieTest.php b/tests/CookieTest.php
index f6762aa..092553b 100644
--- a/tests/CookieTest.php
+++ b/tests/CookieTest.php
@@ -292,6 +292,14 @@ public function testGetters(): void
         $this->assertEquals(Cookie::SAME_SITE_LAX, $cookie->getSameSite());
     }
 
+    public function testRawValue(): void
+    {
+        $cookie = (new Cookie('test'))->withRawValue('Q==');
+
+        $this->assertSame('Q==', $cookie->getValue());
+        $this->assertSame('test=Q==; Path=/; Secure; HttpOnly; SameSite=Lax', (string)$cookie);
+    }
+
     public function testImmutability(): void
     {
         $expires = new DateTime();
@@ -310,6 +318,7 @@ public function testImmutability(): void
         $this->assertNotSame($original, $original->withSameSite(Cookie::SAME_SITE_LAX));
         $this->assertNotSame($original, $original->withSecure(true));
         $this->assertNotSame($original, $original->withValue('value'));
+        $this->assertNotSame($original, $original->withRawValue('value'));
         $this->assertNotSame($original, $original->expire());
         $this->assertNotSame($original, $original->expireWhenBrowserIsClosed());
     }