Solstice Cookies and Solar Cooking

The forecast high in Phoenix for the longest day of the year was 120F (49C).

So it seemed like a great day to try baking outside.

On the way home from the summer solstice celebration at Burton Barr Library last Tuesday, we picked up chocolate chip cookie dough. I chose that for my solar cooking experiment, because there’s no raw egg in it, and if it doesn’t cook all the way, you end up with doughy cookies – not a bad thing, in my opinion!

I scooped spoonfuls of cookie dough into a reflective aluminum roasting pan, covered the top with plastic wrap, sealed the sides with packing tape to trap the heat, and added a meat thermometer, so I could see how hot it actually got next to the cookies.

I had intended to get an earlier start, but at 3:45pm, it was still 120 degrees out. So I decided to give it a go and set the pan in direct sun on our concrete patio.

The temperature inside the pan got as high as 160. The cookies began to look like they were melting, with the oil separating from the dough.

Four hours later, the sun was low enough in the sky that the whole patio was in the shade. The dough had flattened out into cookie shapes that were somewhat solid but still pretty soft.

So we scooped vanilla frozen yogurt on top (à la pizookie), and it was delicious!

Apparently, a proper solar oven will bake faster, even if it’s not as hot out. But I would try my improvised “oven” again on a day when I could get an earlier start and give it a little more time in the sun.

– More info –

The package actually said not to eat the cookie dough raw. That didn’t stop me. But I thought you should know.
Many of the solar ovens I saw online have glass on top. If you decide to use plastic wrap like I did (because I didn’t have any glass panes just sitting around), try to get good cling wrap. I used the Target brand, and it was really annoying trying to get it tight across the top. (In the end, it was a wrinkly mess.)

Articles to check out…

The science of baking at different temperatures.
Solar oven tips and recipes.
DIY solar oven from a pizza box (and how to bake cookies in one).
Baking cookies in a ready-made solar cooker.

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June 5, 2017April 28, 2026

Chalk Robots

There was a chalk drawing of a robot on the ground. No explanation. Just an arrow.

So, of course, we followed it – and the next one and the next one – down the steps behind Pike Place Market in Seattle.

We tried to guess where they were leading. A street art project? A robot maker? Nowhere? The den of our new robot overlords?
Continue reading “Chalk Robots”

June 1, 2017December 9, 2025

Year Four in Nine Videos

Today marks the fourth anniversary of Travelcraft Journal! (And the 350th post!) I thought we could take a look back on the past year in 4 places, 4 projects, and 9 videos.

1. Southern California/Pasadena

First, let’s road trip to Pasadena in one minute. Of course, we’ll stop for date shakes on the way. Once we get there, we can visit the Norton Simon Museum and the jungle garden at the Huntington.

Video: Phoenix to Pasadena in one minute

Project: In honor of sea breezes and Santa Ana winds, make a mobile or wind chime!
Continue reading “Year Four in Nine Videos”

May 8, 2017April 28, 2026

Vacancy

abandoned building through a chain link fence

Phillip read an article about an old hotel that had been sitting abandoned for years with plans to tear it down when the city decided instead to preserve it.
Continue reading “Vacancy”

May 5, 2017May 21, 2021

The Opening Of The Fire Pit

After our morning hike at Tumamoc Hill, we returned to the Mission Garden that evening for demonstrations on agave rope making and roasting, tequila tastings, a display of products made from agave fibers, plant sale, and The Opening of the Fire Pit.

The day before – probably about the time Phillip and I were driving from Phoenix to Tucson – a group had gathered at the Mission Garden.

Jesús García, an Education Specialist at the Arizona-Sonora Desert Museum, was demonstrating how to build a fire in a traditional roasting pit and fill it with agave hearts. They would be covered with metal from the side of an old washing machine and then layers of dirt to keep the heat inside the earth oven.

Other than the repurposed washing machine, the pit would be similar to the ones we had seen evidence of on our hike that morning, the charcoal gray rocks contrasting with the reddish desert clay only hinting at what was under our feet.

We don’t know exactly how the ancient roasting pits worked. Current tribes in the area have not continued this tradition. However, Jesús García pointed out that just a few miles south of the border, “the tradition is still alive.” He talked to his family in Mexico about the process, taking notes and drawing extensive diagrams about every step.

Adapting those techniques to the Tucson area has taken some trial and error. Apparently, last year’s cooking time wasn’t quite enough.

So this year, they would give the agave a full 24 hours to cook underground before literally digging in and opening up the fire pit.

That must be the magic number. It was soft and slightly sweet. Each variety had a different flavor. One tasted like sweet potatoes.

So what if you don’t happen to have access to a 5-foot by 6-foot roasting pit?

Carolyn Niethammer shared how she roasts quartered agave heads in her home oven – just roast at 350 for 17 hours (!)

Once they’ve been roasted, you can add them into other dishes.

With an electric skillet, she demonstrated how to saute up some agave along with nopales (prickly pear pads), peppers, and tepary beans, a drought-tolerant heritage bean that has recently come back into use. It was delicious!

[Update: I posted my video of her cooking demo on our YouTube!]

She followed up by passing around some “Aztec delights,” bite-sized treats she made from amaranth, chia, agave syrup, and chocolate.

It was a sweet finish to our Mission Garden visit.

Next Agave Heritage Festival events in Downtown Tucson:

May 6 + 7, 10am + 1pm: Fibers, Tequila and Fun at Arizona-Sonora Desert Museum. Included with admission.
May 6 + 7, 10am: Agave Garden Tours at Arizona-Sonora Desert Museum. Included with admission.
May 6 + 7, 10am: Rare + Collectible Agave Sale at Arizona-Sonora Desert Museum. Included with admission.
May 6, 6pm: Agave Fest tequila party at Hotel Congress. $35
May 7, 11am: Agave Heritage Brunch at Carriage House. Proceeds from this brunch help benefit Mission Garden. $55

We were guests of Hotel Congress and Maynards Market + Kitchen.