Introduction
This snack cake is a cozy, no-fuss chocolate cake built for practicality as much as flavor. It comes from a home cook who makes it for camping trips because it travels well, needs no frosting, and holds up outside a kitchen setting — which also makes it a natural fit for potlucks, lunchboxes, or an easy weeknight dessert. What sets it apart from a typical chocolate cake is the base of quick-cooking oats soaked in boiling water, which keeps the crumb moist and tender without needing extra butter or oil. A touch of instant coffee deepens the chocolate flavor without making the cake taste like coffee, and a mix of all-purpose and whole wheat flour gives it a slightly heartier texture than a purely white-flour cake. Mini chocolate chips and chopped pecans are folded into the batter and sprinkled on top, so every bite gets a bit of extra richness and crunch. It bakes in a simple 13×9-inch pan, cuts into 24 pieces, and needs nothing more than a wire rack to cool on before it’s ready to serve.
Ingredients
- 1 cup quick-cooking oats
- 1¾ cups boiling water
- ¼ cup butter, softened
- ½ cup sugar
- ½ cup packed brown sugar
- 2 large eggs, room temperature
- ⅓ cup buttermilk
- 3 tbsp canola oil
- 1 tsp vanilla extract
- ¾ cup all-purpose flour
- ¾ cup whole wheat flour
- 2 tbsp dark baking cocoa
- 1 tbsp instant coffee granules
- 1 tsp baking soda
- ⅛ tsp salt
- 1 cup miniature semisweet chocolate chips, divided
- ¾ cup chopped pecans, divided
The oats and boiling water combination is doing important work here — it softens the oats into something closer to a porridge, which keeps the finished cake moist for days rather than drying out quickly the way many oil-based cakes can. The instant coffee is optional in flavor impact but recommended, since it intensifies the chocolate notes rather than adding a noticeable coffee taste.
How to Make It
Step 1 – Soften the oats. Preheat your oven to 350°F. Place the oats in a large bowl and pour the boiling water over them. Let this sit for about 10 minutes so the oats soften and absorb the water, turning almost porridge-like.
Step 2 – Cream the butter and sugars. While the oats soak, beat the softened butter with both the sugar and brown sugar in a separate large bowl until the mixture looks crumbly, about 2 minutes. Add the eggs one at a time, beating well after each addition so they fully incorporate. Beat in the buttermilk, canola oil, and vanilla extract.
Step 3 – Combine the dry ingredients. In a separate bowl, whisk together the all-purpose flour, whole wheat flour, cocoa, instant coffee granules, baking soda, and salt. Gradually add this dry mixture into the creamed butter-and-sugar mixture, mixing just until combined.
Step 4 – Fold in the extras. Stir the softened oat mixture into the batter, along with ½ cup of the mini chocolate chips and ⅓ cup of the chopped pecans, reserving the rest for topping.
Step 5 – Bake. Pour the batter into a greased 13×9-inch baking pan, spreading it evenly. Sprinkle the remaining chocolate chips and pecans over the top. Bake for 35–40 minutes, or until a toothpick inserted into the center comes out clean. Let the cake cool completely on a wire rack before slicing into 24 pieces.
A Note on Diabetic Suitability
It’s worth being upfront here: as written, this is a traditional cake made with regular sugar, brown sugar, and refined flour, so it isn’t a diabetic-specific recipe the way a sugar-free dessert would be. Each serving contains 22g of total carbohydrate and 13g of sugar, which is a meaningful amount for anyone monitoring blood glucose closely. That said, the listed diabetic exchange of 2 fat and 1½ starch per piece suggests it can still fit into a diabetic meal plan in moderation, particularly if portion size is kept small and it’s balanced against other carbohydrate intake for the day. If you wanted to adapt this specific cake to be more diabetic-friendly, the most effective changes would be swapping both sugars for a granulated sugar substitute, replacing the all-purpose flour with more whole wheat or a low-carb flour blend, and reducing or omitting the chocolate chips in favor of a sugar-free version. As it stands, though, this is best thought of as a treat to enjoy occasionally and in a smaller slice, with an eye on your personal carb targets, rather than a dessert to eat freely — and checking with a doctor or dietitian is always a good idea when working a cake like this into a diabetes-conscious diet.
Nutrition (per piece, based on 24 servings)
- Calories: 174
- Fat: 9g (3g saturated)
- Cholesterol: 23mg
- Sodium: 91mg
- Carbohydrates: 22g
- Sugar: 13g
- Fiber: 2g
- Protein: 3g
- Diabetic exchange: 2 fat, 1½ starch
How to Store
Once the cake has cooled completely, store it covered at room temperature for up to 2–3 days, or in the refrigerator for about a week if you’d like it to last longer — the oats help it stay moist either way. For longer storage, this cake freezes well: wrap individual pieces tightly in plastic wrap, then place them in a freezer bag or airtight container, where they’ll keep for up to 3 months. Thaw pieces at room temperature for a couple of hours, or overnight in the fridge, before serving. Because there’s no frosting to worry about, it travels and stores more easily than most chocolate cakes, which is exactly why it works so well for camping trips and potlucks in the first place.