Barking Chemistry Recipe Sheet
Lab Activity Culinary Science
Barking Chemistry
Gluten-Free Binding & Thermal Dehydration
CHEMIST:
DATE: PD:
The Molecular Mission
How do we bind dough without gluten? Oats lack glutenin and gliadin. Instead, we must utilize the **gelatinizing starches & simple sugars** in ripe bananas, combined with the **emulsifying fats** in natural peanut butter, to engineer a solid, crunchy canine treat.
Lab Reagents (Ingredients)
-
â– 2 Cups
Oat Flour: Start with 1 cup; add remaining as needed. Provides structural starch binding.
-
â– 2 Medium
Ripe Bananas: Acts as a humectant and binder, supplying critical sugar and moisture molecules.
-
■½ Cup
Natural Peanut Butter: Supplies plant lipids (fats) that tenderize the crumb structure and coat flour starches.
Lab Apparatus
- • Mixing Bowl & Spatula
- • Rolling Pin & Cutter
- • Parchment Sheet
- • Oven (Set to 300°F)
K9 Biscuit
SAFETY: Peanut butter must be 100% xylitol-free!
Experimental Protocol (Steps)
1
Oven Calibration Preheat your oven to 300°F (150°C). Line a baking sheet with parchment paper.
Preheat establishes thermal equilibrium for even starch dehydration.
2
Hydration & Dough Formation Mix the oat flour, bananas, and peanut butter. Blend thoroughly until a sticky dough forms.
Moisture from banana hydrates oat starches to physically bind particles.
3
Mechanical Shaping Lightly flour the counter surface, then roll out dough. Use a cookie cutter, knife, or pizza cutter to shape treats.
Mechanical rolling aligns and compacts starches without rubbery gluten.
4
Thermal Spacing Lay treats on the parchment paper, leaving about a half-inch (1.2cm) of space between each treat.
Proper spacing enables hot air convection to dehydrate all edges.
5
Dehydration & Cooling Bake 25-30 mins until puffed and lightly browned. Remove tray with mitts. Let cool—treats firm up as they cool.
Heat evaporates water; cooling solidifies starches and fats into a crisp crunch.
Lab Journal & Observations
LAB PROTOCOL: CLEAN KITCHEN AREA
Describe how the gluten-free oat flour and banana starch interacted under mechanical force and thermal energy:
1. Dough Hydration & Stickiness (Step 2):
2. Spacing Impact on Airflow (Step 4):
3. Cooling Phase Texture Transition (Step 5):
