diff --git a/examples/app-architecture/offline_first/lib/main.dart b/examples/app-architecture/offline_first/lib/main.dart
index 15d62269b5..8136e09584 100644
--- a/examples/app-architecture/offline_first/lib/main.dart
+++ b/examples/app-architecture/offline_first/lib/main.dart
@@ -20,7 +20,6 @@ class MyApp extends StatelessWidget {
       title: 'Flutter Demo',
       theme: ThemeData(
         colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
-        useMaterial3: true,
       ),
       home: UserProfileScreen(
         viewModel: UserProfileViewModel(
diff --git a/examples/cookbook/design/themes/lib/main.dart b/examples/cookbook/design/themes/lib/main.dart
index 4f2d1991ca..7b3cb1003b 100644
--- a/examples/cookbook/design/themes/lib/main.dart
+++ b/examples/cookbook/design/themes/lib/main.dart
@@ -19,8 +19,6 @@ class MyApp extends StatelessWidget {
     return MaterialApp(
       title: appName,
       theme: ThemeData(
-        useMaterial3: true,
-
         // Define the default brightness and colors.
         colorScheme: ColorScheme.fromSeed(
           seedColor: Colors.purple,
diff --git a/examples/cookbook/effects/gradient_bubbles/lib/main.dart b/examples/cookbook/effects/gradient_bubbles/lib/main.dart
index e2339450da..84f4e0172d 100644
--- a/examples/cookbook/effects/gradient_bubbles/lib/main.dart
+++ b/examples/cookbook/effects/gradient_bubbles/lib/main.dart
@@ -18,7 +18,7 @@ class App extends StatelessWidget {
     return MaterialApp(
       debugShowCheckedModeBanner: false,
       title: 'Flutter Chat',
-      theme: ThemeData.dark(useMaterial3: true),
+      theme: ThemeData.dark(),
       home: home,
     );
   }
diff --git a/examples/cookbook/lists/spaced_items/lib/main.dart b/examples/cookbook/lists/spaced_items/lib/main.dart
index e01bf7ddbc..d45154eafa 100644
--- a/examples/cookbook/lists/spaced_items/lib/main.dart
+++ b/examples/cookbook/lists/spaced_items/lib/main.dart
@@ -15,7 +15,6 @@ class SpacedItemsList extends StatelessWidget {
       theme: ThemeData(
         colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
         cardTheme: CardTheme(color: Colors.blue.shade50),
-        useMaterial3: true,
       ),
       home: Scaffold(
         body: LayoutBuilder(builder: (context, constraints) {
diff --git a/examples/cookbook/testing/integration/introduction/lib/main.dart b/examples/cookbook/testing/integration/introduction/lib/main.dart
index 839057487e..8ff1925497 100644
--- a/examples/cookbook/testing/integration/introduction/lib/main.dart
+++ b/examples/cookbook/testing/integration/introduction/lib/main.dart
@@ -13,7 +13,6 @@ class MyApp extends StatelessWidget {
       title: 'Flutter Demo',
       theme: ThemeData(
         colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
-        useMaterial3: true,
       ),
       home: const MyHomePage(title: 'Flutter Demo Home Page'),
     );
diff --git a/examples/testing/native_debugging/lib/main.dart b/examples/testing/native_debugging/lib/main.dart
index 00aa6b980d..104dbefcea 100644
--- a/examples/testing/native_debugging/lib/main.dart
+++ b/examples/testing/native_debugging/lib/main.dart
@@ -17,7 +17,6 @@ class MyApp extends StatelessWidget {
     return MaterialApp(
       title: 'URL Launcher',
       theme: ThemeData(
-        useMaterial3: true,
         colorSchemeSeed: Colors.purple,
       ),
       home: const MyHomePage(title: 'URL Launcher'),
diff --git a/src/content/cookbook/design/themes.md b/src/content/cookbook/design/themes.md
index 505e9d6b1f..a2f1cacdcb 100644
--- a/src/content/cookbook/design/themes.md
+++ b/src/content/cookbook/design/themes.md
@@ -52,8 +52,6 @@ Flutter creates a default theme for you.
 MaterialApp(
   title: appName,
   theme: ThemeData(
-    useMaterial3: true,
-
     // Define the default brightness and colors.
     colorScheme: ColorScheme.fromSeed(
       seedColor: Colors.purple,
@@ -208,8 +206,6 @@ class MyApp extends StatelessWidget {
     return MaterialApp(
       title: appName,
       theme: ThemeData(
-        useMaterial3: true,
-
         // Define the default brightness and colors.
         colorScheme: ColorScheme.fromSeed(
           seedColor: Colors.purple,
diff --git a/src/content/cookbook/effects/gradient-bubbles.md b/src/content/cookbook/effects/gradient-bubbles.md
index 9f101ebfbc..e6e82b89eb 100644
--- a/src/content/cookbook/effects/gradient-bubbles.md
+++ b/src/content/cookbook/effects/gradient-bubbles.md
@@ -279,7 +279,7 @@ class App extends StatelessWidget {
     return MaterialApp(
       debugShowCheckedModeBanner: false,
       title: 'Flutter Chat',
-      theme: ThemeData.dark(useMaterial3: true),
+      theme: ThemeData.dark(),
       home: home,
     );
   }
diff --git a/src/content/cookbook/lists/spaced-items.md b/src/content/cookbook/lists/spaced-items.md
index 17441c5733..74bfba58d3 100644
--- a/src/content/cookbook/lists/spaced-items.md
+++ b/src/content/cookbook/lists/spaced-items.md
@@ -181,7 +181,6 @@ class SpacedItemsList extends StatelessWidget {
       theme: ThemeData(
         colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
         cardTheme: CardTheme(color: Colors.blue.shade50),
-        useMaterial3: true,
       ),
       home: Scaffold(
         body: LayoutBuilder(builder: (context, constraints) {