The Happiest Birthday Cake Hat knitting pattern is the cutest birthday hat ever. This adorable baby hat pattern comes with instructions to knit a frosted birthday cake hat with pink frosting swags, white icing and colorful rainbow sprinkles. And then it’s finished with cute knit candles on top! You can knit this adorable hat in any of four sizes and make as many candles as you need for your birthday child! This hat is knit in the round, the candles are knit flat and the hat requires basic knowledge of fair isle or stranded knitting techniques.