how do i get nice and firm, non-runny, good-tasting cupcake frosting?

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ok so the only recipes i've found so far either make runny frosting (even if it isn't super runny .. but it is always runny enough to drip), or like the really gross kind that basically tastes like you are chomping on a mouthful of pure margarine. can anyone help me out here? i want something nice and firm looking, like this for example: http://www.google.ca/imgres?imgurl=http://www.cakejournal.com/uploaded_images/billeder-n043_resize-775916.JPG&imgrefurl=http://www.cakejournal.com/archives/cupcakes-with-buttercream-icing&usg=__Erijq9Xq5n1vTyi3diOFlktcDUw=&h=384&w=512&sz=38&hl=en&start=0&zoom=1&tbnid=QJGiYiU9sex3IM:&tbnh=128&tbnw=171&prev=/images%3Fq%3Dcupcake%2Bicing%26um%3D1%26hl%3Den%26sa%3DN%26biw%3D1182%26bih%3D583%26tbs%3Disch:10%2C42&um=1&itbs=1&iact=hc&vpx=124&vpy=209&dur=79&hovh=194&hovw=259&tx=171&ty=64&ei=LGQUTd3nEoSksQO-19GRCg&oei=LGQUTd3nEoSksQO-19GRCg&esq=1&page=1&ndsp=18&ved=1t:429,r:6,s:0&biw=1182&bih=583