9x9-Inch Half King Arthur Chocolate Cake

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So before we get to the recipe--scroll down if you're one of those "just give me the recipe, Susan" types (love ya, mean it)--I have to tell you about the time I tried to bake this cake during a mild existential crisis brought on by a squirrel, a rogue Roomba, and the haunting memory of my high school jazz band solo.

It was a Tuesday. Or maybe a Thursday. You know the kind--where you wake up to the smell of burnt toast, only you didn't make any toast, and the toaster's been unplugged since 2017. That kind of day.

I had exactly two eggs left. Not metaphorically--I mean literally two eggs, and I knew if I used them, I was committing to cake. No room for quiche. No room for regrets.

So I gather my ingredients, right? Eggs. Oil. Water. Cake mix. The holy tetrahedron. I'm halfway through whisking like a deranged barista on a mission when my 5-year-old comes sprinting in, pantsless, yelling, "THE ROOBA ATE MY LEGO CASTLE!" Which, honestly, is just par for the course around here.

Long story short, the Roomba is now named Debra, she's in time-out, and the Lego Kingdom has declared independence. Meanwhile, I go back to the batter, only to realize I forgot to preheat the oven. Classic me. So I crank it to 300°F, say a small prayer to Saint Betty Crocker, and line the pan like it's a tiny origami sleeping bag.

This is when the squirrel comes in.

Yes. A squirrel. Through the open kitchen window like it owns the place. It lands directly on the counter, makes eye contact, and steals a chocolate chip from my trail mix like it's in Mission: Impossible. Then it leaves. No notes.

Anyway. Back to the cake.

You're going to whisk everything together, pour it into your beautifully lined and greased 9x9 pan (which I recommend over the 8x8 unless you like chaos), and bake it until it hits 190°F. You'll need an instant-read thermometer unless you enjoy poking cakes and guessing like it's a weird baking-themed magic 8-ball.

Don't forget to rotate the pan halfway through unless you want one side moist and the other side doing its best Sahara Desert impression.

Oh, and one last thing: this is based on the King Arthur Gluten Free Chocolate Cake Mix, which is amazing unless you use expired eggs, which I did once during Mercury retrograde and we do not talk about it.

Alright, now that I've overshared you into a new timeline, here's the recipe you came for. Happy baking, and may your cake rise higher than my standards in college.

Ingredients Only
Ingredient Amount Ratio Procedure

Eggs 2 0.006
Canola Oil 145g 0.460
Water 160g 0.508
1 Preheat the oven to 300°F (150°C).
2 Whisk eggs, canola oil, and water together in a large bowl until fully combined.
Ingredient Amount Ratio Procedure

Cake Mix 315g 1.000
3 Gradually add cake mix while whisking.
4 Continue whisking until smooth.
5 Line a 9x9-inch cake pan with parchment paper, trimming the corners for a smooth fit.
6 Grease the parchment paper.
7 Pour the batter into the pan.
8 Bake until the cake is 190°F (88°C) throughout.

Notes

  1. Based on King Arthur Gluten Free Chocolate Cake Mix. The full recipe is on the back of the box.
  2. Liquids can be measured in milliliters (1:1 with grams).
  3. Rotate the pan during baking for best results. Most ovens have uneven heat.
  1. Food Scale: measuring ingredients by weight is more accurate than volume.
  2. Whisk: a balloon whisk works best, a fork can suffice.
  3. 9" Square Cake Pan: ideal size for this recipe.
  4. Instant-Read Thermometer: measuring doneness by temperature is more accurate than time.

Details

2 Whisk eggs, canola oil, and water together in a large bowl until fully combined.

4 Continue whisking until smooth.

5 Line a 9x9-inch cake pan with parchment paper, trimming the corners for a smooth fit.

7 Pour the batter into the pan.

8 Bake until the cake is 190°F (88°C) throughout.