1mixins.jade

mixin features(header, desc, features)
  section.feature-1
    h2= header
    .container
      .row
        h4.col-sm-10.col-sm-offset-1.text-center= desc
        each feature in features
          .col-sm-3.text-center
            i(class="fa fa-#{feature.icon} fa-#{feature.size}")
            h4= feature.title
            p= feature.p

2testmixins.jade

-
    features = [
        { title: 'Feature title', p: 'Feature content', icon: 'beer', size: 'lg' },
        { title: 'Feature title', p: 'Feature content', icon: 'beer', size: 'lg' },
        { title: 'Feature title', p: 'Feature content', icon: 'beer', size: 'lg' }
    ]
    
+features("Header", "Description", features)

3out.html

<section class="feature-1">
  <h2>Header</h2>
  <div class="container">
    <div class="row">
      <h4 class="col-sm-10 col-sm-offset-1 text-center">Description</h4>
      <div class="col-sm-3 text-center">
        <i class="fa fa-beer fa-lg"></i>
        <h4>Feature title</h4>
        <p>Feature content</p>
      </div>
      <div class="col-sm-3 text-center">
        <i class="fa fa-beer fa-lg"></i>
        <h4>Feature title</h4>
        <p>Feature content</p>
      </div>
      <div class="col-sm-3 text-center">
        <i class="fa fa-beer fa-lg"></i>
        <h4>Feature title</h4>
        <p>Feature content</p>
      </div>
    </div>
  </div>
</section>
<section class="feature-1">
  <h2>Header</h2>
  <div class="container">
    <div class="row">
      <h4 class="col-sm-10 col-sm-offset-1 text-center">Description</h4>
      <div class="col-sm-3 text-center">
        <i class="fa fa-beer fa-lg"></i>
        <h4>Feature title</h4>
        <p>Feature content</p>
      </div>
      <div class="col-sm-3 text-center">
        <i class="fa fa-beer fa-lg"></i>
        <h4>Feature title</h4>
        <p>Feature content</p>
      </div>
      <div class="col-sm-3 text-center">
        <i class="fa fa-beer fa-lg"></i>
        <h4>Feature title</h4>
        <p>Feature content</p>
      </div>
    </div>
  </div>
</section>