diff --git a/packages/flutter_tools/lib/src/debug_adapters/error_formatter.dart b/packages/flutter_tools/lib/src/debug_adapters/error_formatter.dart
index e55c235ea45..99987a29800 100644
--- a/packages/flutter_tools/lib/src/debug_adapters/error_formatter.dart
+++ b/packages/flutter_tools/lib/src/debug_adapters/error_formatter.dart
@@ -118,7 +118,11 @@ class FlutterErrorFormatter {
     final bool allChildrenAreLeaf = node.children.isNotEmpty &&
         !node.children.any((_ErrorNode child) => child.children.isNotEmpty);
     if (node.level == _DiagnosticsNodeLevel.summary || allChildrenAreLeaf) {
-      _writeNode(node, recursive: false);
+      // DiagnosticsBlock is a container, so recurse into its children if
+      // there's only a single level. The container may be
+      // "The relevant error-causing widget was" and the child may be
+      // the specific widget details.
+      _writeNode(node, recursive: node.type == _DiagnosticsNodeType.DiagnosticsBlock && allChildrenAreLeaf);
     }
   }
 }
@@ -148,6 +152,10 @@ enum _DiagnosticsNodeStyle {
   flat,
 }
 
+enum _DiagnosticsNodeType {
+  DiagnosticsBlock,
+}
+
 class _ErrorData extends _ErrorNode {
   _ErrorData(super.data);
 
@@ -167,6 +175,7 @@ class _ErrorNode {
   List<_ErrorNode> get properties => asList('properties', _ErrorNode.new);
   bool get showName => data['showName'] != false;
   _DiagnosticsNodeStyle? get style => asEnum('style', _DiagnosticsNodeStyle.values);
+  _DiagnosticsNodeType? get type => asEnum('type', _DiagnosticsNodeType.values);
 
   String? asString(String field) {
     final Object? value = data[field];
diff --git a/packages/flutter_tools/test/general.shard/dap/flutter_adapter_test.dart b/packages/flutter_tools/test/general.shard/dap/flutter_adapter_test.dart
index fbb225f4ea0..a5e0d09c110 100644
--- a/packages/flutter_tools/test/general.shard/dap/flutter_adapter_test.dart
+++ b/packages/flutter_tools/test/general.shard/dap/flutter_adapter_test.dart
@@ -3,12 +3,14 @@
 // found in the LICENSE file.
 
 import 'dart:async';
+import 'dart:convert';
 
 import 'package:dds/dap.dart';
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/cache.dart';
+import 'package:flutter_tools/src/debug_adapters/error_formatter.dart';
 import 'package:flutter_tools/src/debug_adapters/flutter_adapter.dart';
 import 'package:flutter_tools/src/debug_adapters/flutter_adapter_args.dart';
 import 'package:flutter_tools/src/globals.dart' as globals show fs, platform;
@@ -797,6 +799,55 @@ void main() {
         expect(adapter.processArgs, contains('tool_args'));
       });
     });
+
+    group('error formatter', () {
+      /// Helpers to build a string representation of the DAP OutputEvents for
+      /// the structured error [errorData].
+      String getFormattedError(Map<String, Object?> errorData) {
+        // Format the error and write into a buffer in a text format convenient
+        // for test expectations.
+        final StringBuffer buffer = StringBuffer();
+        FlutterErrorFormatter()
+          ..formatError(errorData)
+          ..sendOutput((String category, String message, {bool? parseStackFrames, int? variablesReference}) {
+            buffer.writeln('${category.padRight(6)} ${jsonEncode(message)}');
+          });
+        return buffer.toString();
+      }
+
+      test('includes children of DiagnosticsBlock when writing a summary', () {
+        // Format a simulated  error that nests the error-causing widget in a
+        // diagnostic block and will be displayed in summary mode (because it
+        // is not the first error since the last reload).
+        // https://github.com/Dart-Code/Dart-Code/issues/4743
+        final String error = getFormattedError(<String, Object?>{
+          'errorsSinceReload': 1, // Force summary mode
+          'description': 'Exception caught...',
+          'properties': <Map<String, Object?>>[
+            <String, Object>{
+            'description': 'The following assertion was thrown...',
+            },
+            <String, Object?>{
+              'description': '',
+              'type': 'DiagnosticsBlock',
+              'name': 'The relevant error-causing widget was',
+              'children': <Map<String, Object>>[
+                <String, Object>{
+                'description': 'MyWidget:file:///path/to/widget.dart:1:2',
+                }
+              ]
+            }
+          ],
+        });
+
+        expect(error, r'''
+stdout "\n"
+stderr "════════ Exception caught... ═══════════════════════════════════════════════════\n"
+stdout "The relevant error-causing widget was:\n    MyWidget:file:///path/to/widget.dart:1:2\n"
+stderr "════════════════════════════════════════════════════════════════════════════════\n"
+''');
+      });
+    });
   });
 }