Preheat oven to 350°F with rack in middle. Line bottom and sides of a buttered 15- by 10-inch shallow baking pan (1 inch deep) with a sheet of parchment paper and butter parchment.
Melt butter with treacle, sugar, and water in a small saucepan over medium heat, stirring, then cool to room temperature, stirring occasionally.
Whisk together flour, baking powder, and ground ginger in a large bowl. Whisk in butter mixture and egg yolk until smooth.
Beat egg white in a medium bowl with an electric mixer until it just holds stiff peaks, then fold into batter gently but thoroughly.
Pour into baking pan, spreading evenly, and bake until top is golden and firm to the touch, 18 to 22 minutes. Cool cake in pan 5 minutes, then cover cake with a slightly damp kitchen towel and cool completely, about 1 hour.
Dust cake generously with confectioners sugar, then cover with a sheet of parchment, then with a baking sheet or rack. Invert cake and peel off parchment now on top.
Beat cream until it just holds stiff peaks, then spread evenly over top of cake, leaving a 1/2-inch border. Sprinkle crystallized ginger over cream. Roll up cake, starting from a short side, to make a 10-inch log, removing parchment as you go.
If desired, slices of roulade can be frozen (up to 1 week), then lightly sprinkled with turbinado sugar (such as Sugar in the Raw) and broiled (do not thaw first) in a shallow baking pan 5 to 6 inches from heat until golden, about 3 minutes.
Cooks' note: Roulade can be made 1 day ahead and chilled, covered.

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	269.79 Kcal (1130 kJ)
Calories from fat	108.4 Kcal
		% Daily Value*
Total Fat	12.04g	19%
Cholesterol	59.24mg	20%
Sodium	107.83mg	4%
Potassium	102.66mg	2%
Total Carbs	38.34g	13%
Sugars	17.83g	71%
Dietary Fiber	0.49g	2%
Protein	2.75g	6%
Vitamin C	0.2mg	0%
Vitamin A	0.1mg	2%
Iron	0.3mg	2%
Calcium	44.4mg	4%

Amount Per 100 g
Calories	345.33 Kcal (1446 kJ)
Calories from fat	138.75 Kcal
		% Daily Value*
Total Fat	15.42g	19%
Cholesterol	75.83mg	20%
Sodium	138.02mg	4%
Potassium	131.41mg	2%
Total Carbs	49.08g	13%
Sugars	22.83g	71%
Dietary Fiber	0.62g	2%
Protein	3.52g	6%
Vitamin C	0.2mg	0%
Vitamin A	0.1mg	2%
Iron	0.4mg	2%
Calcium	56.9mg	4%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.

Tastes

salty
savory
bitter
sweet

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Recipe Tags

Weightwatchers Points

6.3

Points
7

PointsPlus

Good Points

saturated fat free,
low sodium

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