Whip the cream in a cold mixing bowl until soft peaks form. About 3 to 4 minutes, then set aside.
In a separate bowl, mix sweetened condensed milk with vanilla extract and salt until combined.
Gently fold the whipped cream into the condensed milk mixture. Don’t stir, fold until no streaks remain.
Divide the mixture evenly into three bowls. Leave one as-is (white), color the second with red food coloring, and the third with blue. Stir each until fully blended.
Alternate spoonfuls of red, white, and blue into a 9x5-inch loaf pan. Continue until all the mixtures are used up.
If you want a marbled ice cream, use a skewer or butter knife to gently swirl the colors for a marbled look. Avoid overmixing. If you prefer a block pattern, skip this step.
Top with sprinkles and or m and ms.
Cover the pan with plastic wrap or foil and freeze for 6 hours or overnight, until firm.
Notes
Gel food coloring gives more vibrant colors without watering down the mixture.
Chill your mixing bowl and beaters to help the cream whip faster and hold its shape.
For added flavor, stir in a teaspoon of strawberry or berry-flavored gelatin to the red and blue portions before swirling.
Want some crunch? Add sprinkles or crushed cookies before freezing.
Let sit at room temperature for 5–10 minutes before scooping for the best texture.