1 serving (medium) of Starbucks Tall Oat Milk Flat White (354 g) has 170 calories. That works out to 48 calories per 100 g. It contains 21.9 g of carbs, 3.2 g of protein, 7.1 g of fat and 2.8 g of fiber. Its 424.8 mg of Calcium covers 42% of the Daily Value. Its glycemic index is 45 (low), so it raises blood sugar slowly.

Starbucks Tall Oat Milk Flat White Nutrition Facts

Selected: 100 g

KCAL / 100G

Carbs

6.2g

· 2% DV

Protein

0.9g

· 2% DV

Fat

· 3% DV

Fiber

0.8g

· 3% DV

DV is the share of the daily value covered, on a 2,000 kcal reference diet.

Calories come from: Carbs 53% · Protein 8% · Fat 39%

Starbucks Tall Oat Milk Flat White Vitamins & Minerals

Vitamins

B12

0.15µg · 6% DV

0.05mg · 4% DV

Vitamin D

0.75µg · 4% DV

0.03mg · 3% DV

Minerals

Calcium

120mg · 12% DV

Phosphorus

32mg · 5% DV

Magnesium

17mg · 4% DV

Iodine

4µg · 3% DV

How Nutritious Is Starbucks Tall Oat Milk Flat White?

Nutrient density

Medium

38/ 100

How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.

Satiety score

Medium

41/ 100

An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.

Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.

Starbucks Tall Oat Milk Flat White Glycemic Index

GLYCEMIC INDEX

Low

0 Low5570100

GLYCEMIC LOAD

Low

Accounts for portion size — a more realistic measure than GI alone.

How to Burn Off Starbucks Tall Oat Milk Flat White

To burn the 48 calories in 100 g:

🚶

12min

Walking (5 km/h)

🏃

5min

Running (8 km/h)

🚴

7min

Cycling

🏊

6min

Swimming

Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.

Is Starbucks Tall Oat Milk Flat White Processed?

NOVA 3

Processed

1. Unprocessed

2. Minimally Processed

3. Processed

4. Ultra-Processed

NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.

Does Starbucks Tall Oat Milk Flat White Contain Allergens?

Contains these allergens:

Gluten yes

Dairy free

Eggs free

Peanuts free

Tree nuts free

Fish free

Soy free

Sesame free

Which Diets Is Starbucks Tall Oat Milk Flat White Good For?

Vegan

✓ Suitable

Vegetarian

✓ Suitable

Gluten-Free

— Not suitable

Dairy-Free

— Not suitable

Mediterranean

✓ Suitable

Paleo

— Not suitable

Whole30

— Not suitable

DASH

— Not suitable

Keto

— Not suitable

Low FODMAP

— Not suitable

Starbucks Tall Oat Milk Flat White Fat Profile

SATURATED

0.25g

MONOUNSATURATED

0.75g

POLYUNSATURATED

0.5g

⚖️

Omega 6:3 ratio 10.5:1

Above the ideal 4:1 (10.5:1).

Compare Starbucks Tall Oat Milk Flat White

☕vs☕️

Starbucks Tall Oat Milk Flat White vs Turkish coffee41 kcal more per 100 g

→☕vs🥛

Starbucks Tall Oat Milk Flat White vs Ayran11 kcal more per 100 g

→☕vs🧊🍵

Starbucks Tall Oat Milk Flat White vs Iced Tea28 kcal more per 100 g

→☕vs🍵

Starbucks Tall Oat Milk Flat White vs Tea47 kcal more per 100 g

→

Foods Similar to Starbucks Tall Oat Milk Flat White

☕️

Turkish coffee

7 kcal

🥛

Ayran

37 kcal

🧊🍵

Iced Tea

20 kcal

🍵

Tea

1 kcal

🥤

Detox Water

2 kcal

🥤

Soda

42 kcal

☕️

Coffee

2 kcal

🥤

Cola

42 kcal

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Nutrition data compiled from USDA FoodData Central and scientific sources.

· Last updated: September 23, 2026