diff --git a/analysis_options.yaml b/analysis_options.yaml
index 37f1c95755..15d3b9b962 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -40,6 +40,7 @@ linter:
     - avoid_types_as_parameter_names
     - avoid_unused_constructor_parameters
     - avoid_void_async
+    - unawaited_futures
     - await_only_futures
     - camel_case_types
     - cancel_subscriptions
diff --git a/lib/android.dart b/lib/android.dart
index a9e8327b9a..1b7fa0b312 100644
--- a/lib/android.dart
+++ b/lib/android.dart
@@ -193,11 +193,10 @@ void createMipmapXmlFile(
     );
   }
 
-  mipmapXmlFile.create(recursive: true).then((File adaptiveIconFile) {
-    adaptiveIconFile.writeAsString(
-      xml_template.mipmapXmlFile.replaceAll('{{CONTENT}}', xmlContent),
-    );
-  });
+  mipmapXmlFile.createSync(recursive: true);
+  mipmapXmlFile.writeAsStringSync(
+    xml_template.mipmapXmlFile.replaceAll('{{CONTENT}}', xmlContent),
+  );
 }
 
 /// Retrieves the colors.xml file for the project.
@@ -249,13 +248,10 @@ void _createAdaptiveBackgrounds(
 
 /// Creates a colors.xml file if it was missing from android/app/src/main/res/values/colors.xml
 void createNewColorsFile(String backgroundColor, String? flavor) {
-  File(constants.androidColorsFile(flavor))
-      .create(recursive: true)
-      .then((File colorsFile) {
-    colorsFile.writeAsString(xml_template.colorsXml).then((File file) {
-      updateColorsFile(colorsFile, backgroundColor);
-    });
-  });
+  final colorsFile = File(constants.androidColorsFile(flavor));
+  colorsFile.createSync(recursive: true);
+  colorsFile.writeAsStringSync(xml_template.colorsXml);
+  updateColorsFile(colorsFile, backgroundColor);
 }
 
 /// Updates the colors.xml with the new adaptive launcher icon color
@@ -296,14 +292,14 @@ void overwriteExistingIcons(
   String? flavor,
 ) {
   final Image newFile = utils.createResizedImage(template.size, image);
-  File(
+  final file = File(
     constants.androidResFolder(flavor) +
         template.directoryName +
         '/' +
         filename,
-  ).create(recursive: true).then((File file) {
-    file.writeAsBytesSync(encodePng(newFile));
-  });
+  );
+  file.createSync(recursive: true);
+  file.writeAsBytesSync(encodePng(newFile));
 }
 
 /// Saves new launcher icons to the project, keeping the old launcher icons.
@@ -316,30 +312,30 @@ void _saveNewImages(
   String? flavor,
 ) {
   final Image newFile = utils.createResizedImage(template.size, image);
-  File(
+  final file = File(
     constants.androidResFolder(flavor) +
         template.directoryName +
         '/' +
         iconFilePath,
-  ).create(recursive: true).then((File file) {
-    file.writeAsBytesSync(encodePng(newFile));
-  });
+  );
+  file.createSync(recursive: true);
+  file.writeAsBytesSync(encodePng(newFile));
 }
 
 /// Updates the line which specifies the launcher icon within the AndroidManifest.xml
 /// with the new icon name (only if it has changed)
 ///
 /// Note: default iconName = "ic_launcher"
-Future<void> overwriteAndroidManifestWithNewLauncherIcon(
+void overwriteAndroidManifestWithNewLauncherIcon(
   String iconName,
   File androidManifestFile,
-) async {
+) {
   // we do not use `file.readAsLinesSync()` here because that always gets rid of the last empty newline
   final List<String> oldManifestLines =
-      (await androidManifestFile.readAsString()).split('\n');
+      androidManifestFile.readAsStringSync().split('\n');
   final List<String> transformedLines =
       _transformAndroidManifestWithNewLauncherIcon(oldManifestLines, iconName);
-  await androidManifestFile.writeAsString(transformedLines.join('\n'));
+  androidManifestFile.writeAsStringSync(transformedLines.join('\n'));
 }
 
 /// Updates only the line containing android:icon with the specified iconName
diff --git a/lib/ios.dart b/lib/ios.dart
index 5fad0e7da2..7b3386db62 100644
--- a/lib/ios.dart
+++ b/lib/ios.dart
@@ -123,11 +123,9 @@ void overwriteDefaultIcons(IosIconTemplate template, Image image) {
 void saveNewIcons(IosIconTemplate template, Image image, String newIconName) {
   final String newIconFolder = iosAssetFolder + newIconName + '.appiconset/';
   final Image newFile = createResizedImage(template, image);
-  File(newIconFolder + newIconName + template.name + '.png')
-      .create(recursive: true)
-      .then((File file) {
-    file.writeAsBytesSync(encodePng(newFile));
-  });
+  final file = File(newIconFolder + newIconName + template.name + '.png');
+  file.createSync(recursive: true);
+  file.writeAsBytesSync(encodePng(newFile));
 }
 
 /// create resized icon image
@@ -152,7 +150,7 @@ Image createResizedImage(IosIconTemplate template, Image image) {
 /// Change the iOS launcher icon
 Future<void> changeIosLauncherIcon(String iconName, String? flavor) async {
   final File iOSConfigFile = File(iosConfigFile);
-  final List<String> lines = await iOSConfigFile.readAsLines();
+  final List<String> lines = iOSConfigFile.readAsLinesSync();
 
   bool onConfigurationSection = false;
   String? currentConfig;
@@ -180,18 +178,17 @@ Future<void> changeIosLauncherIcon(String iconName, String? flavor) async {
   }
 
   final String entireFile = '${lines.join('\n')}\n';
-  await iOSConfigFile.writeAsString(entireFile);
+  iOSConfigFile.writeAsStringSync(entireFile);
 }
 
 /// Create the Contents.json file
 void modifyContentsFile(String newIconName) {
   final String newIconFolder =
       iosAssetFolder + newIconName + '.appiconset/Contents.json';
-  File(newIconFolder).create(recursive: true).then((File contentsJsonFile) {
-    final String contentsFileContent =
-        generateContentsFileAsString(newIconName);
-    contentsJsonFile.writeAsString(contentsFileContent);
-  });
+  final contentsJsonFile = File(newIconFolder);
+  contentsJsonFile.createSync(recursive: true);
+  final String contentsFileContent = generateContentsFileAsString(newIconName);
+  contentsJsonFile.writeAsStringSync(contentsFileContent);
 }
 
 String generateContentsFileAsString(String newIconName) {
diff --git a/lib/main.dart b/lib/main.dart
index 4b235fa33a..f8e1831144 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -87,7 +87,7 @@ Future<void> createIconsFromArguments(List<String> arguments) async {
       );
     }
     try {
-      await createIconsFromConfig(
+      createIconsFromConfig(
         flutterLauncherIconsConfigs,
         logger,
         prefixPath,
@@ -109,7 +109,7 @@ Future<void> createIconsFromArguments(List<String> arguments) async {
             'No configuration found for $flavor flavor.',
           );
         }
-        await createIconsFromConfig(
+        createIconsFromConfig(
           flutterLauncherIconsConfigs,
           logger,
           prefixPath,
@@ -125,12 +125,12 @@ Future<void> createIconsFromArguments(List<String> arguments) async {
   }
 }
 
-Future<void> createIconsFromConfig(
+void createIconsFromConfig(
   Config flutterConfigs,
   FLILogger logger,
   String prefixPath, [
   String? flavor,
-]) async {
+]) {
   if (!flutterConfigs.hasPlatformConfig) {
     throw const InvalidConfigException(errorMissingPlatform);
   }
diff --git a/test/android_test.dart b/test/android_test.dart
index f65fb8b8de..e72ac3bdbf 100644
--- a/test/android_test.dart
+++ b/test/android_test.dart
@@ -71,7 +71,7 @@ void main() {
 
     await withTempFile('AndroidManifest.xml', (File androidManifestFile) async {
       androidManifestFile.writeAsStringSync(inputManifest);
-      await android.overwriteAndroidManifestWithNewLauncherIcon(
+      android.overwriteAndroidManifestWithNewLauncherIcon(
         'ic_other_icon_name',
         androidManifestFile,
       );
@@ -89,7 +89,7 @@ void main() {
 
     await withTempFile('AndroidManifest.xml', (File androidManifestFile) async {
       androidManifestFile.writeAsStringSync(inputManifest);
-      await android.overwriteAndroidManifestWithNewLauncherIcon(
+      android.overwriteAndroidManifestWithNewLauncherIcon(
         'ic_launcher',
         androidManifestFile,
       );
@@ -106,7 +106,7 @@ void main() {
 
     await withTempFile('AndroidManifest.xml', (File androidManifestFile) async {
       androidManifestFile.writeAsStringSync(inputManifest);
-      await android.overwriteAndroidManifestWithNewLauncherIcon(
+      android.overwriteAndroidManifestWithNewLauncherIcon(
         'ic_launcher',
         androidManifestFile,
       );
@@ -124,7 +124,7 @@ void main() {
 
     await withTempFile('AndroidManifest.xml', (File androidManifestFile) async {
       androidManifestFile.writeAsStringSync(inputManifest);
-      await android.overwriteAndroidManifestWithNewLauncherIcon(
+      android.overwriteAndroidManifestWithNewLauncherIcon(
         'ic_launcher',
         androidManifestFile,
       );
@@ -142,7 +142,7 @@ void main() {
 
     await withTempFile('AndroidManifest.xml', (File androidManifestFile) async {
       androidManifestFile.writeAsStringSync(inputManifest);
-      await android.overwriteAndroidManifestWithNewLauncherIcon(
+      android.overwriteAndroidManifestWithNewLauncherIcon(
         'ic_launcher',
         androidManifestFile,
       );