You should now know that eyeballing the amount of sugar or baking soda in a cup is not enough when baking. Even the slightest mistake can turn a fluffy cake into a dense, sad sheet the moment it hits your counter. While kitchen scales are helpful, professionals like Christina Tosi prefer to go one step further and use an ultra-accurate gemstone scale. Jewelers use this tool to weigh precious stones. Weigh Gram200g Digital Pocket Gram Scale$14 $11 (29% off) AmazonThe Milk Bar founder and two-time James Beard Award winner showed how precise the Weigh Gram Jewelry Scale is. Tosi uses the scale to weigh salt and then compares it with a kitchen scale that doesn’t register anything. This is when you can get the most precise with your ingredients, which will make a big difference in micro-changes. The more precise your measurements are, the more likely it is that you will achieve consistent, delicious results. The Weigh Gram Jewelry Scale is only $10. Each scale can weigh 200 grams at once. It has touchscreen buttons and an LED screen so you can see the exact weight of something without having to squint. Tosi says that serious bakers are “picky” when it comes to the details. If you’re a home baker or aspiring to be one, then you need this scale in your life. Watch the full Instagram video to see Tosi in action. Then grab the scale while it’s only $10. Your next batch (and cakes and brownies) of cookies will thank you.