9.4k members in the mountaindew community. Mountain Dew Spark should taste like “Dew with a blast of raspberry lemonade,” as it says on the label. Supposedly, this was a sample from a PepsiCo plant, so we hope it actually makes it into production. Mountain Dew Spark is far from the only flavor change the brand has made to its soda over the years. The original post was deleted, so the fate of Mountain Dew Spark … Post, share, and discuss all your favorite … The MTN DEW SPARK is new Mountain Dew soda flavor created by the brand to offer thirsty consumers with a different take on the classic refreshment. Do you guys like Mountain Dew? 238 votes, 112 comments.