Preparation. Mushrooms and Buttercream Step 1. Preheat oven to 225°. Whisk egg whites, sugar, cream of tartar, and salt in a large heatproof bowl set over a medium saucepan of simmering water ...

Increase oven to 400°. Coat a 13x18" rimmed baking sheet with nonstick spray and line with parchment paper, leaving overhang on long sides. Spray parchment.

Syrup. Ingredients. ¼ cup hot water; 1 tablespoon sugar; 2 tablespoons rum or Cognac; Directions. Stir the sugar into the water until dissolved. Stir in the rum.

I’ll get right down to it: The cake took me all day. I started shortly after 9 a.m., and the kids finished helping me decorate it at 4:45p.m., just before we needed to leave for the party.