RECORD LOCATED / 2026.09.01

Two boxed brownie mixes in a 9 × 13 pan

First check the pan yield printed on each box. Two small-pan mixes may suit a 9 × 13 pan; two family-size mixes may be too much. Brand-dependent technique; no exact box weight was supplied.

FOOD-040REV A

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A CLOSER LOOK

Match the mix size to the pan

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Diagram comparing two small-pan brownie mixes with one 9 × 13 pan.Explanatory drawing based on this record

Small-pan mixes: Two mixes intended for 8 × 8 pans fit a similar-depth 9 × 13
Family-size mixes: Two 9 × 13 mixes need two pans
Ingredients: Use each box’s listed additions once

CLASSIFICATIONFOOD

STATUSRecovered/Partial

MATERIALKITCHEN / RECIPE

DISPOSITIONPUBLIC / RECOVERED/PARTIAL

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A RECIPE TO MAKEADDED TO THIS RECORD

A named-mix example supplies exact quantities; the historical unspecified-box advice cannot define a universal ingredient list.

Added 2026.09.15. This recipe addition is separate from the original notes below; it is not a claim of a tested batch.

Two-mix fudgy brownies in a 9 x 13-inch pan

New matching recipe using a specified mix and the manufacturer’s published double-batch ingredient totals, with a newly adapted 9 x 13-inch workflow. The original box brand and a universal deep-pan bake time were not recovered.

YIELD: 24 brownies
PREP / WAIT: 10 minutes; at least 2 hours cooling
COOK: Approximately 40–60 minutes at 325°F; follow the selected mix’s double-batch directions

Ingredients

2 standard packages Ghirardelli Dark Chocolate Brownie Mix, each intended for an 8- or 9-inch square pan
1/2 cup (120 ml) water
1 cup (240 ml) neutral oil, such as refined peanut oil or canola oil
2 large eggs
1 tsp oil, for the pan

Method

Check that each selected package calls for 1/4 cup water, 1/2 cup oil and 1 egg. This card’s totals are for that formula; a differently formulated mix requires its own package quantities.
Heat oven to 325°F. Lightly oil a light-colored metal 9 x 13-inch pan and line with parchment extending over the long sides.
Whisk water, oil and eggs, then stir in both dry mixes just until combined. Spread evenly in the pan; do not whip air into the batter.
Use the product’s two-package 9 x 13-inch bake time if printed. Otherwise begin checking at 40 minutes and allow approximately 40–60 minutes for this adaptation. Look for a set surface, firm edges and a center that does not flow when the pan is gently moved; a chocolate-chip pocket can appear wet even when the surrounding batter is baked.
Cool undisturbed on a rack for at least 2 hours. Do not compress the warm slab. Lift by the parchment and cut only after it is fully cool; chilling the cooled slab for 30 minutes can help clean cuts.

Notes & storage

This is a specified, measurable mix example because the original box brand is not recoverable from the text. It does not claim to be the original product or its manufacturer-tested 9 x 13 method.
The historical fewer-eggs modification is retained in the conversation record; this supplement uses the selected mix’s full egg amount for a sliceable result.
Keep airtight at room temperature up to 3 days or freeze up to 2 months.

Recipe basis & references

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TECHNICAL NOTES///

First check the pan yield printed on each box. Two small-pan mixes may suit a 9 × 13 pan; two family-size mixes may be too much.

ORIGINAL RECORD / RETAINED NOTESCooking / recipe

SOURCE STATENew recipe or technique reference; not a recovered exact recipe

GOALRun the first test described in this guide and record the result for two boxed brownie mixes in a 9 × 13 pan.

PREPARATION / NOTES

Brand-dependent technique; no exact box weight was supplied.

INGREDIENTS

Exact quantities were not preserved in the manifest entry; add the recovered batch sheet when available.

STEPS

Read both boxes and add their required eggs, oil and water exactly; do not double ingredients again after combining two mixes.
If each box is intended for an 8-inch square pan, a 9 × 13 pan is a reasonable similar-depth starting arrangement. If each is already intended for 9 × 13, use two pans unless the manufacturer gives a deep-pan method.
Prepare the pan and use the package temperature appropriate for its material. Start checking near the package time and extend only as needed.
Look for set edges and moist crumbs rather than raw batter, then cool fully before cutting.

TROUBLESHOOTING

Pan depth and material affect bake time. Do not fill so high that the batter can overflow; excess belongs in a second pan. A melted chocolate pocket can confuse the toothpick test.

SAFETY / LIMITS

Treat this as a public recipe note, not a substitute for current food-safety guidance.

THINGS TO WATCH FOR

Pan depth and material affect bake time. Do not fill so high that the batter can overflow; excess belongs in a second pan. A melted chocolate pocket can confuse the toothpick test.

RESULTThe center is set without dry edges, and the record states the exact mix size and pan used.

DEVELOPMENT HISTORY///

2026.09.01Rev A

Imported as an independent manifest record; public copy keeps uncertainty visible.

SPECIFICATION///

TypeKitchen / recipe

SourceRecovered notes and content manifest

ValidationNext test should record batch, temperature, time, and result

FocusBatch size, heat path, center doneness, and texture

RELEASED MATERIAL///

food-040-public-summary.txtPUBLIC SUMMARY / RECOVERED NOTES

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WHERE THIS STANDS

The center is set without dry edges, and the record states the exact mix size and pan used.

The record keeps what is known at this revision. Unfinished tests stay unfinished here.