In a large bowl, whisk together baking soda and citric acid until evenly combined.
Drizzle in essential oils and mix well to evenly distribute the scent.
Lightly mist with water from a spray bottle, mixing as you go, until the texture resembles damp sand and holds its shape when pressed.
Firmly press the mixture into silicone molds or muffin tins. For decoration, sprinkle dried lavender buds at the bottom of the molds before adding the mixture.
Allow the steamers to air dry at room temperature for 24 hours.
Gently remove the steamers from the molds and store them in an airtight container to preserve their freshness.
