Several large storms sidelined our trip to Lake Tahoe this past weekend. We were planning to go with friends who, earlier in the week, had stocked up on groceries in anticipation of the the trip. (Four boys and two sets of parents. Plenty of mouths to feed.) With the trip cancelled and the skies fully opened and dumping rain in the Bay Area, we decided to have pajama day and a potluck. I threw open the pantry and knew this would be the perfect rainy day dessert.
Mochi is sweet glutinous rice flour. Someone probably intended to call it ”gluttonous” rice flour but mispelled it. It is the key ingredient and it cannot be substituted. Really, no substitutions. I used Koda Farms Mochiko, which is a Japanese American family-owned farm in California. You can find it in most grocery and health food stores (it’s gluten free), including Safeway and Whole Foods. It’s great for savory or sweet dishes and is often used as a thickening agent.
The preparation of this cake is as simple as it gets – dump, whisk, and bake. It does take significantly longer than a standard cake in the oven, however, clocking in at one and a half hours. Place it in the oven, walk away, and enjoy the sweet custard smell permeate the house.
The result is delicious in taste and texture. The coconut milk and eggs add a rich, creamy flavor and the texture is delicately chewy with a crunchy edge. FHE suggested a topping or filling and my neighbors concurred. (FHE topped his share with pistachio gelato tonight.) To stay with the Asian profile, next time I’ll add a middle layer of red bean paste and a green tea frosting. But even in pure form, good luck practicing self-restraint when faced with a pan of these chewy bars. It’s not easy. What is easy is whipping up a batch. Which I encourage you to do.
Sweet Rice-Flour and Coconut Cake, adapted from Gourmet Magazine, May 2005

Ingredients
3 cups mochiko (sweet glutinous rice flour; 1 lb)
2 1/2 cups granulated sugar
2 teaspoons baking powder
1/4 teaspoon salt
2 (14-oz) cans unsweetened coconut milk (I used low-fat; the original recipe calls for full-fat)
4 large eggs (original recipe uses 5, but I found it a bit too eggy)
1/2 stick (1/4 cup) unsalted butter, melted and cooled
1 teaspoon vanilla
Directions
- Put oven rack in middle position and preheat oven to 350°F.
- Whisk together mochiko, sugar, baking powder, and salt in a large bowl. Whisk together coconut milk, eggs, butter, and vanilla in another bowl. Add coconut mixture to flour mixture, whisking until batter is combined.
- Pour batter into an ungreased 13- by 9-inch baking pan, smoothing top, and bake until top is golden and cake begins to pull away from sides of pan, about 1 1/2 hours.
- Cool cake completely in pan on a rack, about 2 hours. Cut mochi into 24 squares before serving. Leftovers will keep, covered and chilled, 3 days.

Matcha Green Tea Frosting, adapted from Cupcake Bakeshop
Ingredients
2 sticks butter, softened at room temperature
1/4 cup heavy cream or half-and-half
1 tbsp matcha green tea powder
3 cups confectioners sugar, sifted
Directions
- In the bowl of an electric mixer, whip butter until fluffy.
- In a small bowl, mix cream and matcha until well combined.
- To the electric mixer, add 1 cup sugar and beat until combined. Scrape down bowl, then add 1/3 of the cream-matcha mixture. Beat to combine, scrape down bowl, then add another cup of sugar. Continue alternating until you have used up all of the remaining ingredients. Turn the mixer to high, and whip until frosting is light and fluffy.
- Top on fully cooled cake.
Red Bean Filling
Ingredients
1 jar Red Bean Paste (found at Asian supermarkets)
1/2 cup confectioner’s sugar
2 tbsp heavy whipping cream
Directions
- Whip ingredients together until a frosting-like consistency is reached. Add additional sugar if necessary.
- After preparing the cake batter, spoon 2/3 of the batter in the pan. Then carefully add the red bean filling. Top with remaining 1/3 of the batter. Bake as directed.
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