Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.0.rc.1)
// Compass (v0.13.alpha.7)
// ----

// a compound map value retrieval function, arbitrary level of depth
@function map-value($map, $keys...) { 
    @each $key in $keys { $map: map-get($map, $key); }
    @return $map;
}

// a map output mixin, iterates at arbitrary level of depth
@mixin map-iterate($map, $keys...) {
    @each $key, $value in map-value($map, $keys...) {
        #{$key}: $value;
    }
}

// sample nested map
$font-data: (
    body: (
        font-family: (georgia, serif), 
        font-style: normal,
        font-weight: normal
    ),
    heading: (
        font-family: (helvetica, sans-serif),
        font-style: normal,
        font-weight: bold
    )
);

// test output
.test {
    single-value: map-value($font-data, body, font-family);
    .iteration {
        @include map-iterate($font-data, heading);
    }
}

SassMeister-output.css

.test {
  single-value: georgia, serif;
}
.test .iteration {
  font-family: helvetica, sans-serif;
  font-style: normal;
  font-weight: bold;
}