Studying the effects of temperature on cookies are necessary especially if the impact on quality attributes are to be deduced. More so, blending wheat flour, date flour, and pineapple juice could improve the nutrient quality required in modern-day cookies. This current study investigated the quality attributes of date and wheat flour pineapple juice blended cookies as affected by different baking temperatures. With pineapple juice serving as water substitute, the formulated date, and wheat flour blends adhered to the following ratios: 100:0, 90:10, 80:20, and 70:30. Baking cookies involved two different temperatures (160 °C and 180 °C) with constant time (30 min). Quality attributes determined proximate composition, micronutrients, physical and functional properties, and microbial and sensory qualities. Cookies proximate results showed moisture (6.89–7.40%), protein (8.73–10.22%), fat (14.37–15.99%), fiber (1.02–1.11%), ash (0.77–1.20%) and carbohydrate (64.85–67.71%). Various ranges appeared, from energy values (434.90–444.10 kcal), minerals (calcium = 33.18–62.45 mg/100 g; iron = 3.47–5.75 mg/100 g; potassium = 100.07–358.63 mg/100 g), vitamins (vitamin A =1.99–4.89 mg/100 g; vitamin C = 0.04–0.15 mg/100 g), physical (weight = 7.4–7.75 g; diameter = 3.50–4.01 cm; thickness = 0.99–1.20 cm; volume = 3.11–3.77 cm3; density = 2.06–2.41 g/cm3; spread ratio = 2.92–4.05 cm3), to functional (water absorption = 1.14–1.18 g/g; oil absorption capacity = 1.31–1.33 g/g; bulk density = 0.74–0.76 g/mL) properties. The microbial loads seemed somewhat acceptable as overall acceptability favoured sample WDFb (90% wheat, 10% date flour). The acceptability of cookies baked at 160 °C over those baked at 180 °C suggests the need for further studies to determine the energy requirements, and long-term environmental implications such (baking) temperatures would pose.
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