Hi all I was searching for myself what 30 Baume syrup was and came across an older post here. I did a little research and in one of my professional cookbooks, tucked away in small print as a side note was a recipe for it, broken down into 3 designations. Hope this helps! It's certainly made it possible for me to now make the White Mirror Glaze I've been dying to try. 30 BAUME SYRUP Like simple syrup, 30 baume syrup is an essential ingredient for the pastry chef. The difference between simple syrup and 30 baume syrup is in the ratio between sugar and water. 30 baume syrup calls for 137 percent sugar to 100 percent water. Ingredients : Baker's % Kilogram US decimal Water 100.00 0.844 1.861 Sugar 137.00 1.156 2.549 Total 237.00 2.000 4.410 Ingredients : Lb & Oz Test Water 1 13 3/4 13 5/8 oz Sugar 2 8 3/4 1 lb 2 3/8 oz Total 4 6 1/2 2 lb Process 1. Combine the water and sugar and wash down the sides of the pot. 2. Bring to a boil, remove from the heat, cover, and reserve.