What is the best sugar substitute for baking that won't spike my blood sugar?

For baking, the most popular and effective blood-sugar-friendly substitutes are Erythritol, Monk Fruit extract, and Stevia blends specifically formulated for baking. Erythritol is a sugar alcohol that has almost zero impact on blood glucose and measures 1:1 like regular sugar, though it can have a slight cooling aftertaste. Monk fruit and stevia are natural, zero-calorie sweeteners that are intensely sweet, so they are often blended with erythritol to mimic the bulk and texture of sugar. Avoid substituting with honey, maple syrup, or agave nectar; while they are often marketed as "natural," your body processes them almost exactly like refined white sugar, and they will still cause significant spikes.