Custom Button in Flutter

What I am trying to achieve is below:

Should I be using Row with Icon and Text?

Here is my code and its output

    RaisedButton(
          elevation: 10,
          onPressed: () {},
          color: Colors.white,
          child: Padding(
            padding: EdgeInsets.all(10),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
              children: <Widget>[
                Container(
                  height: 55,
                  color: Colors.deepPurple,
                  child: Icon(
                    Icons.settings,
                    color: Colors.white,
                  ),
                ),
                Text(
                  'Settings',
                  style: TextStyle(
                    fontSize: 25,
                  ),
                ),
              ],
            ),
          ),
        );

OUTPUT:

Any help would be appreciated.

John Joe's answer is correct. Here is another solution that does the same with plain Container widget. I am posting it here just in case someone interested.

 import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: Colors.white),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Padding(
              padding: EdgeInsets.all(8.0),
              child: MyWidget(),
            ),
          ],
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return SizedBox(
      height: 48.0,
      child: Container(
        decoration: BoxDecoration(
            color: Colors.white,
            borderRadius: BorderRadius.all(
              Radius.circular(8.0),
            ),
            boxShadow: [
              BoxShadow(
                  color: Colors.grey,
                  offset: Offset(1.0, 2.0),
                  blurRadius: 8.0,
                  spreadRadius: 2.0)
            ]),
        child: Stack(
          children: <Widget>[
            Row(
              children: <Widget>[
                Container(
                    width: 48.0,
                    height: 48.0,
                    alignment: Alignment.centerLeft,
                    decoration: BoxDecoration(
                      color: Colors.deepPurple,
                      borderRadius: BorderRadius.all(
                        Radius.circular(8.0),
                      ),
                    ),
                    child: Align(
                        alignment: Alignment.center,
                        child: Icon(Icons.settings))),
                Expanded(
                    child: Center(
                  child: Text("Hellow world",
                      style: Theme.of(context)
                          .textTheme
                          .headline6
                          .copyWith(color: Colors.black)),
                )),
              ],
            ),
            SizedBox.expand(
              child: Material(
                type: MaterialType.transparency,
                child: InkWell(onTap: () {}),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

See the live demo here.