My biscuits are a little 'flat' because even though I took a special trip to the store to buy all the ingredients, I managed to leave out the dessicated coconut!! LOL!!
Here I am shooting with direct sun coming through a diffuser placed behind the biscuits. I don't often shoot high key & found quite a difference to a normal histogram and contrast. I think I need more practice with this style for food photography (and also in cooking biscuits)!
but you could also use baking parchment for macro shots like this, or even 'net' curtain material for larger shots. It stops harsh shadows.