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HTML 

              
                <div class="cake">
    <div class="plate"></div>
    <div class="layer layer-bottom"></div>
    <div class="layer layer-middle"></div>
    <div class="layer layer-top"></div>
    <div class="icing"></div>
    <div class="drip drip1"></div>
    <div class="drip drip2"></div>
    <div class="drip drip3"></div>
    <div class="candle">
        <div class="flame"></div>
    </div>
</div>
!

CSS 

              
                $vanilla: #f0e4d0;
$chocolate: #553c13;

body {
    background-color: #333;
}

@mixin foodColoring($color) {
    background-color: $color;
    box-shadow:
        0 2px 0px lighten($color, 5%),
        0 4px 0px darken($color, 8.2%),
        0 6px 0px darken($color, 8.4%),
        0 8px 0px darken($color, 8.6%),
        0 10px 0px darken($color, 8.8%),
        0 12px 0px darken($color, 9%),
        0 14px 0px darken($color, 9.2%),
        0 16px 0px darken($color, 9.4%),
        0 18px 0px darken($color, 9.6%),
        0 20px 0px darken($color, 9.8%),
        0 22px 0px darken($color, 10%),
        0 24px 0px darken($color, 10.2%),
        0 26px 0px darken($color, 10.4%),
        0 28px 0px darken($color, 10.6%),
        0 30px 0px darken($color, 10.8%);
}

.cake {
    position: absolute;
    width: 250px;
    height: 200px;
    top: 50%;
    left: 50%;
    margin-top: -70px;
    margin-left: -125px;
}

.plate {
    width: 270px;
    height: 110px;
    position: absolute;
    bottom: -10px;
    left: -10px;
    background-color: #ccc;
    border-radius: 50%;
    box-shadow:
        0 2px 0 darken(#ccc, 10%),
        0 4px 0 darken(#ccc, 10%),
        0 5px 40px rgba(black, 0.5);
}

.cake > * {
    position: absolute;
}

.layer {
    position: absolute;
    display: block;
    width: 250px;
    height: 100px;
    border-radius: 50%;
    @include foodColoring($chocolate);
}

.layer-top { top: 0px; }
.layer-middle { top: 33px; }
.layer-bottom { top: 66px; }

.icing {
    top: 2px;
    left: 5px;
    background-color: $vanilla;
    width: 240px;
    height: 90px;
    border-radius: 50%;
    &:before {
        content: "";
        position: absolute;
        top: 4px;
        right: 5px;
        bottom: 6px;
        left: 5px;
        background-color: lighten($vanilla, 3%);
        box-shadow:
            0 0 4px lighten($vanilla, 5%),
            0 0 4px lighten($vanilla, 5%),
            0 0 4px lighten($vanilla, 5%);
        border-radius: 50%;
        z-index: 1;
    }
}

.drip {
    display: block;
    width: 50px;
    height: 60px;
    border-bottom-left-radius: 25px;
    border-bottom-right-radius: 25px;
    background-color: $vanilla;
}

.drip1 {
    top: 53px;
    left: 5px;
    transform: skewY(15deg);
    height: 48px;
    width: 40px;
}

.drip2 {
    top: 69px;
    left: 181px;
    transform: skewY(-15deg);
}

.drip3 {
    top: 54px;
    left: 90px;
    width: 80px;
    border-bottom-left-radius: 40px;
    border-bottom-right-radius: 40px;
}

.candle {
    background-color: #7B020B;
    width: 16px;
    height: 50px;
    border-radius: 8px / 4px;
    top: -20px;
    left: 50%;
    margin-left: -8px;
    z-index: 10;
    &:before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 16px;
        height: 8px;
        border-radius: 50%;
        background-color: lighten(#7B020B, 10%);
    }
}

.flame {
    position: absolute;
    background-color: orange;
    width: 15px;
    height: 35px;
    border-radius: 10px 10px 10px 10px / 25px 25px 10px 10px;
    top: -34px;
    left: 50%;
    margin-left: -7.5px;
    z-index: 10;
    box-shadow:
        0 0 10px rgba(orange, 0.5),
        0 0 20px rgba(orange, 0.5),
        0 0 60px rgba(orange, 0.5),
        0 0 80px rgba(orange, 0.5);
    transform-origin: 50% 90%;
    animation: flicker 1s ease-in-out alternate infinite;
}

@keyframes flicker {
    0% {
        transform: skewX(5deg);
        box-shadow: 
            0 0 10px rgba(orange, 0.2),
            0 0 20px rgba(orange, 0.2),
            0 0 60px rgba(orange, 0.2),
            0 0 80px rgba(orange, 0.2) }
    25% {
        transform: skewX(-5deg);
        box-shadow:
            0 0 10px rgba(orange, 0.5),
            0 0 20px rgba(orange, 0.5),
            0 0 60px rgba(orange, 0.5),
            0 0 80px rgba(orange, 0.5) }
    50% {
        transform: skewX(10deg);
        box-shadow:
            0 0 10px rgba(orange, 0.3),
            0 0 20px rgba(orange, 0.3),
            0 0 60px rgba(orange, 0.3),
            0 0 80px rgba(orange, 0.3) }
    75% {
        transform: skewX(-10deg);
        box-shadow:
            0 0 10px rgba(orange, 0.4),
            0 0 20px rgba(orange, 0.4),
            0 0 60px rgba(orange, 0.4),
            0 0 80px rgba(orange, 0.4) }
    100% {
        transform: skewX(5deg);
        box-shadow:
            0 0 10px rgba(orange, 0.5),
            0 0 20px rgba(orange, 0.5),
            0 0 60px rgba(orange, 0.5),
            0 0 80px rgba(orange, 0.5) }
}
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JS
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