Digital Kitchen Scale
Essential for cup-to-gram accuracy and repeatable bakes.
Shop scales ↗Pure starch extracted from corn. Primary use as a thickener and tenderiser.
Reviewed by CupOrGram Editorial TeamData methodology: NIST-derived density references + recipe testing notesMethodology
Properties
Density Index
0.54 g/cm3
1 Cup Weight
128g
Texture
Dry
Category
Baking
Top Substitute
Arrowroot Powder
Use 1:1
Very similar behaviour. Better for acid-based and frozen sauces.
Conversions
| cups | grams |
|---|---|
| 1/4 cups | 31.9 grams |
| 1/3 cups | 42.2 grams |
| 1/2 cups | 63.9 grams |
| 1 cups | 128 grams |
| 1.50 cups | 192 grams |
| 2 cups | 256 grams |
| 3 cups | 383 grams |
| 4 cups | 511 grams |
Density: 0.54 g/ml
Quick Convert
Density-accurate conversions for baking
—
grams
Science Note: Precision within +/-0.002g
Recommended Tools & Pantry Picks for Cornstarch
Optional shopping references for bakers who want to compare tools and pantry options related to cornstarch.
Measuring Cup & Spoon Set
Useful for quick volume checks before converting to weight.
Shop measuring sets ↗Disclosure: Some outbound links are affiliate links. As an Amazon Associate, CupOrGram earns from qualifying purchases. Learn more.
Substitutions for Cornstarch
Arrowroot Powder
excellent1:1
Very similar behaviour. Better for acid-based and frozen sauces.
Very similar behaviour. Better for acid-based and frozen sauces.
Tapioca Starch
goodUse 2 tbsp tapioca per 1 tbsp cornstarch
Creates chewier, more elastic texture. Good for pie fillings.
Creates chewier, more elastic texture. Good for pie fillings.
All-Purpose Flour
goodUse 2 tbsp flour per 1 tbsp cornstarch
Half the thickening power. Creates opaque, less glossy results.
Half the thickening power. Creates opaque, less glossy results.
Storage Tips
Cool, dry place. Indefinite shelf life if kept dry.
Baking Science
Thickens by gelatinizing starch granules when heated with liquid. Twice the thickening power of flour. Creates clear, glossy sauces.
Recipe Context
For chemical leavening: small weight changes alter rise and browning.
For quick breads: over-leavening can cause collapse after oven spring.
For cookies: balance leavening with acid source for predictable spread.
Common Pitfalls
- Switching brands without re-checking weight can change texture and bake time.
- Using volume-only measurements for dense ingredients can overshoot recipe targets.
- Expired leaveners can underperform even when measured correctly.
Brand Variance & Measuring Method
Baseline reference: 1 cup cornstarch = 128g. In real kitchens, a practical range is usually 120g-136g per cup (6% band).
Why this happens: fine powders and leaveners settle during storage, changing cup density.