Provided is an inexpensive foamable oil-in-water emulsified oil and fat composition mainly containing a palm oil and fat, unlikely to be solidified, and having good melting properties in the mouth. The composition includes an oil phase containing an oil and fat component that contains 7 to 55% by mass of S2U triglycerides and 0.5 to 5% by mass of SSS triglycerides and contains the S2U triglycerides and trisaturated triglycerides containing SSS triglycerides in a total amount of 25 to 80% by mass. The mass ratio, S2U triglyceride/SU2 triglyceride, is 0.8 to 2.2, the mass ratio, S2U triglyceride/SSS triglyceride, is 3.8 or more, the mass ratio, SSU triglyceride/SUS triglyceride, is 1.0 or more, and the mass ratio, P/S, is 0.45 or more. The oil and fat component contains solid fats in a ratio of 40% or more at 10°C, 5% or less at 35°C, and 1% or less at 40°C. (S is a saturated fatty acid residue with a carbon number of 16 or more and 22 or less, U is an unsaturated fatty acid residue with a carbon number of 16 or more and 22 or less, and P is a palmitic acid residue)