Identify what your recipe needs vanilla sugar for (caked sweetness, cookie crumb, or dough aroma).
Pick the closest swap from the article (vanilla extract, vanilla bean paste, vanilla sugar by blending sugar, or vanilla powder).
Measure using the swap ratio given for your chosen substitute; if the swap adds liquid, reduce another liquid ingredient slightly.
Stir into batter/dough until evenly distributed, then taste-test the batter briefly if your recipe allows.
Bake as directed; if the vanilla flavor seems faint, increase next time by 25–50% (not 2x) to avoid bitterness.